---
product_id: 728536410
title: "X-Sense Smart Mailbox Alarm, Wireless Long Range Mailbox Alert, Mailbox Sensor with SBS50 Base Station for Delivered Mail, SMA11"
brand: "x-sense"
price: "₹ 775"
currency: INR
in_stock: true
reviews_count: 5
url: https://www.desertcart.in/products/728536410-x-sense-smart-mailbox-alarm-wireless-long-range-mailbox-alert
store_origin: IN
region: India
---

# 2.4 GHz long-range wireless 4-year battery life IP65 waterproof durability X-Sense Smart Mailbox Alarm, Wireless Long Range Mailbox Alert, Mailbox Sensor with SBS50 Base Station for Delivered Mail, SMA11

**Brand:** x-sense
**Price:** ₹ 775
**Availability:** ✅ In Stock

## Summary

> 📬 Stay ahead of your deliveries with smart alerts that keep you connected!

## Quick Answers

- **What is this?** X-Sense Smart Mailbox Alarm, Wireless Long Range Mailbox Alert, Mailbox Sensor with SBS50 Base Station for Delivered Mail, SMA11 by x-sense
- **How much does it cost?** ₹ 775 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.in](https://www.desertcart.in/products/728536410-x-sense-smart-mailbox-alarm-wireless-long-range-mailbox-alert)

## Best For

- x-sense enthusiasts

## Why This Product

- Trusted x-sense brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Long-Lasting Power:** Replaceable lithium battery lasts up to 4 years on average use—set it and forget it.
- • **All-Weather Reliability:** Built to withstand rain, sun, and extreme temperatures with IP65 waterproof rating and UV-resistant shell.
- • **Effortless Wireless Setup:** 100% wire-free design with quick installation using included double-sided tape—set up in minutes.
- • **Seamless Multi-User Sharing:** Share mailbox access with family or colleagues effortlessly via the app for ultimate convenience.
- • **Instant Mail Alerts, Anywhere:** Get real-time push notifications the moment your mail arrives—never miss a delivery again.

## Overview

The X-Sense Smart Mailbox Alarm is a sleek, wireless sensor that sends instant push notifications via a 2.4 GHz connection when mail is delivered. Compatible with multiple mailbox types, it features a 4-year battery life, IP65 waterproof rating, and easy app-based multi-user sharing. Designed for hassle-free installation and reliable all-weather performance, it ensures you never miss important mail again.

## Description

Mailbox Alert, X-Sense Smart Mailbox Alarm, Wireless Long Range Mailbox Alert, Mailbox Sensor with SBS50 Base Station for Delivered Mail, SMA11

Review: It works as intended and is easy to install. - The X-Sense Smart Mailbox Alarm was easy to install. It had very clear instructions that were easy to follow. I've only tested it out 3 times so far, but it works exactly as it is supposed to. I was concerned because I have a 5g network for my computers, and the X-Sense is incompatible with 5g. But, because I connected it to my Apple iPhone X, it had no trouble connecting with 2.4g. The base station has a loud alert so I can hear it from other rooms in the house, and I also get a text message when the mailbox door is opened. The mail just came while I was writing this review, and it worked like a charm. I was a little leery, but this is an awesome product and is well worth the price. I just hope the mail person does not break it for me. They constantly jam oversized packages into the mail box using the theory that anything will fit with sufficient force. But I am more than satisfied with the mailbox alarm, the ease of installation, and the good instructions.
Review: Great for Parcel Letterbox - The X-Sense mailbox alarm SMA11 which includes the SBS50 base station and the SMA51 sensor works brilliantly. The sensor is small, relatively unobtrusive, and is built for outdoor use. It has an IP65 rating and UV‑resistant housing so it will stand up to rain and sun without looking bulky. The package includes a mounting bracket for the sensor and 2 pieces (1 spare) double‑sided tape for quick installation to your mailbox. The sensor detection combines an infrared sensor and a tilt/motion trigger. I have found that it gives fast, accurate alerts for my parcel letterbox and most likely for most mailbox types. The base station will sound an alarm of your choice from 7 preset alert tones on the base station and you'll get a push notification to your phone the moment the mail flap or mailbox is opened. Range will depend on placement of the SBS50 base station but X‑Sense advertises long‑range transmission suitable for typical suburban setups. The SMA51 sensor (that attaches to your letterbox door/mail flap/parcel door of the letterbox) uses a replaceable CR2 lithium battery and X‑Sense estimates that you'll get about four years of standby life based on approximately 5 triggers per day. Now I find that that excellent and makes for a very low‑maintenance sensor. The X-Sense home security app is fairly straightforward to use and it is from here that you can change alert tones and control the volume (up to 100 dB on the base station). You can share alerts with multiple other users/family members by adding in email addresses, they then get an invitation for which they will need to accept in order to share alerts. You can change device names and clear any alerts from the app or directly from the base station. Just be mindful that this device will not pair directly with your phone you will need the SBS50 base station unless you already have one or buy the kit. My installation is in an all steel bricked in parcel letterbox and the signal has no issue reaching the base station. I am extremely pleased with the operation of the X-Sense Mailbox Alarm so far. In my case I installed the sensor on the inside of the mail flap of the parcel letterbox and it works equally as good when I get mail or when I get a parcel.

## Features

- Real-Time Push Alerts & Multi-User Sharing: The moment your mail arrives, you'll receive an instant app push alert; manage various features from your phone, such as device sharing, mail reminder, one-button silence, adjusting volume up to 100 dB, and ringtone selection
- Long-Distance Transmission, Accurate Detection: With extensive coverage, the smart mailbox alarm maintains a strong and reliable connection to the base station via a 2.4 GHz Wi-Fi network, and promptly sends notifications to your phone
- Compatibility with Various Mailbox Types: This mailbox alarm is designed with a sleek and compact profile; compatible with curbside/post mount, wall mount, slot type, and cluster type mailboxes; not suitable for mail slots without lids
- Extra Long Standby, Easy Setup: The replaceable battery offers a long 4-year lifespan based on 5 daily triggers; the alarm is 100% wire-free and easy to install using the double-sided tape included; following the in-app instructions, simply add it to the X-Sense app in seconds
- Built for All-Weather Durability: With its IP65 waterproof rating and an operating temperature range of 14–140°F (-10–60°C), this wireless mailbox alarm operates reliably even in extreme weather; ASA shell and silicone seal prevent fading caused by sunlight and UV rays

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CPLQ16K7 |
| Battery Description | CR2 and AAA |
| Battery description | CR2 and AAA |
| Brand | X-Sense |
| Colour | Black |
| Compatible Devices | Smartphone |
| Compatible devices | Smartphone |
| Control Method | App |
| Customer Reviews | 4.3 out of 5 stars 1,491 Reviews |
| Included Components | 1 X SBS50 Base Station, 1 X User Manual, 1 X Smart Mailbox Alarm SMA51 |
| Item Type Name | Smart Mailbox Alarm |
| Manufacturer | X-SENSE |
| Maximum Range | 50 Metres |
| Model Number | SMA11 |
| Mounting Type | Mailbox Mount |
| Number of Batteries | 1 CR2 batteries required. (included) |
| Number of batteries | 1 CR2 batteries required. (included) |
| Part Number | X-SENSE |
| Power source | Battery Powered |
| Sensor Technology | Contact Sensor |
| Sound Level | 100 Decibels |
| UPC | 850053675409 |
| Voltage | 3 Volts |
| Wattage | 1000 milliamp_hours |

## Product Details

- **Battery description:** CR2 and AAA
- **Brand:** X-Sense
- **Colour:** Black
- **Compatible devices:** Smartphone
- **Power source:** Battery Powered

## Images

![X-Sense Smart Mailbox Alarm, Wireless Long Range Mailbox Alert, Mailbox Sensor with SBS50 Base Station for Delivered Mail, SMA11 - Image 1](https://m.media-amazon.com/images/I/61JsrJVrxqL.jpg)
![X-Sense Smart Mailbox Alarm, Wireless Long Range Mailbox Alert, Mailbox Sensor with SBS50 Base Station for Delivered Mail, SMA11 - Image 2](https://m.media-amazon.com/images/I/617W2EqMrnL.jpg)
![X-Sense Smart Mailbox Alarm, Wireless Long Range Mailbox Alert, Mailbox Sensor with SBS50 Base Station for Delivered Mail, SMA11 - Image 3](https://m.media-amazon.com/images/I/61BzIWlfsLL.jpg)
![X-Sense Smart Mailbox Alarm, Wireless Long Range Mailbox Alert, Mailbox Sensor with SBS50 Base Station for Delivered Mail, SMA11 - Image 4](https://m.media-amazon.com/images/I/61ARKm9QQxL.jpg)
![X-Sense Smart Mailbox Alarm, Wireless Long Range Mailbox Alert, Mailbox Sensor with SBS50 Base Station for Delivered Mail, SMA11 - Image 5](https://m.media-amazon.com/images/I/61hPCn-zjxL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ It works as intended and is easy to install.
*by S***Y on 15 April 2026*

The X-Sense Smart Mailbox Alarm was easy to install. It had very clear instructions that were easy to follow. I've only tested it out 3 times so far, but it works exactly as it is supposed to. I was concerned because I have a 5g network for my computers, and the X-Sense is incompatible with 5g. But, because I connected it to my Apple iPhone X, it had no trouble connecting with 2.4g. The base station has a loud alert so I can hear it from other rooms in the house, and I also get a text message when the mailbox door is opened. The mail just came while I was writing this review, and it worked like a charm. I was a little leery, but this is an awesome product and is well worth the price. I just hope the mail person does not break it for me. They constantly jam oversized packages into the mail box using the theory that anything will fit with sufficient force. But I am more than satisfied with the mailbox alarm, the ease of installation, and the good instructions.

### ⭐⭐⭐⭐⭐ Great for Parcel Letterbox
*by G***Z on 7 May 2026*

The X-Sense mailbox alarm SMA11 which includes the SBS50 base station and the SMA51 sensor works brilliantly. The sensor is small, relatively unobtrusive, and is built for outdoor use. It has an IP65 rating and UV‑resistant housing so it will stand up to rain and sun without looking bulky. The package includes a mounting bracket for the sensor and 2 pieces (1 spare) double‑sided tape for quick installation to your mailbox. The sensor detection combines an infrared sensor and a tilt/motion trigger. I have found that it gives fast, accurate alerts for my parcel letterbox and most likely for most mailbox types. The base station will sound an alarm of your choice from 7 preset alert tones on the base station and you'll get a push notification to your phone the moment the mail flap or mailbox is opened. Range will depend on placement of the SBS50 base station but X‑Sense advertises long‑range transmission suitable for typical suburban setups. The SMA51 sensor (that attaches to your letterbox door/mail flap/parcel door of the letterbox) uses a replaceable CR2 lithium battery and X‑Sense estimates that you'll get about four years of standby life based on approximately 5 triggers per day. Now I find that that excellent and makes for a very low‑maintenance sensor. The X-Sense home security app is fairly straightforward to use and it is from here that you can change alert tones and control the volume (up to 100 dB on the base station). You can share alerts with multiple other users/family members by adding in email addresses, they then get an invitation for which they will need to accept in order to share alerts. You can change device names and clear any alerts from the app or directly from the base station. Just be mindful that this device will not pair directly with your phone you will need the SBS50 base station unless you already have one or buy the kit. My installation is in an all steel bricked in parcel letterbox and the signal has no issue reaching the base station. I am extremely pleased with the operation of the X-Sense Mailbox Alarm so far. In my case I installed the sensor on the inside of the mail flap of the parcel letterbox and it works equally as good when I get mail or when I get a parcel.

### ⭐⭐⭐⭐⭐ Better than Ring Mailbox Sensor, Working Great at 100'
*by J***W on 11 January 2025*

According to Google Maps, the sensor and base station are 100' from each other, though it's probably a little less (I did some manual measuring but did not want to run my reel tape across the street). Please see the associated picture for my setup. The base station is in my garage on large, cluttered steel shelving, and we have a metal garage door and stucco exterior. The mailbox is also metal, and although the company recommends installing the sensor on the outside of a metal mailbox, that's unreasonable if you think someone might be stealing your mail since they could just slide the sensor right off. So I installed it inside the mailbox. Part of the reason I got the sensor was neighbors complaining about their mail being stolen, but using "USPS Informed Delivery" I can see what I am expecting each day, and an alert from this sensor lets me grab the mail as soon as it arrives if I'm home. It's only been installed a few days but so far it has worked 100% of the time (as confirmed by my own testing and Ring cameras which snapshot every 30 seconds). My mailbox was here when we moved in, and it's a bit unusual. It has a swinging top portion and a locked lower portion. When the mail is delivered, the top portion opens enough that mail can come in, but not your hand, since there is a metal guard that also flips up. I installed the sensor on the lower, inside portion of the metal flap, so it does not block mail delivery (again, see photos), but that means there is always one or two layers of metal between the sensor and the outside which I was afraid would block the signal. In fact, I previously purchased a Ring mailbox sensor that never successfully alerted me to any mail. It triggered in a few tests, but was never reliable inside the box despite the huge antenna. One reason I bought the X-Sense was the separate base station, which could be closer to the mailbox than the Ring Bridge. Ring only lets you have one Bridge, and moving it to the front corner of the garage sacrificed the connection to the lights at the back of our property and still didn't detect the mail. Now the Ring Bridge is in the back of the house, and the X-Sense Base Station is in the Garage. The Ring Sensor might have theoretically been able to trigger cameras that would record who was accessing the mailbox, but since it never worked at all, it was a moot point. On sale, these units cost about the same (even with the X-Sense base station included). The X-Sense is also smaller and easier to install as well as being more effective and reliable. Contrary to another recent review, the app definitely works on Android. I am using a Pixel 6a (2.5yrs old at the time of my review) and it has no issues. Perhaps the other reviewer had a phone that was limited to an out of date Android OS. I am on Android 15. All in all, 5 stars! It even came with two adhesive pads for the backer. My only gripe is that has a two minute delay after triggering before it will trigger again, and I'd like to be able to adjust that timer, but I understand the reasoning.

## Frequently Bought Together

- X-Sense Smart Mailbox Alarm, Wireless Long Range Mailbox Alert, Mailbox Sensor with SBS50 Base Station for Delivered Mail, SMA11
- X-Sense Smart Mailbox Alarm, Requires SBS50 Base Station, Wireless Long Range Mailbox Alert, Mailbox Sensor for Delivered Mail, SMA51
- X-Sense Smart Home Security System, Wireless Home Alarm System 8-Piece Kit, Supports Mobile App Alerts, Compatible with Alexa, Includes 1 Base Station, 4 Door Sensors, 2 Motion Sensors, 1 Keypad, AS08

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*Product available on Desertcart India*
*Store origin: IN*
*Last updated: 2026-07-25*