---
product_id: 625394282
title: "Smart Mailbox Alarm, Requires SBS50 Base Station, Wireless Long Range Mailbox Alert, Mailbox Sensor for Delivered Mail, SMA51"
brand: "x-sense"
price: "11.18 OMR"
currency: OMR
in_stock: true
reviews_count: 8
category: "X Sense"
url: https://www.desertcart.com.om/products/625394282-smart-mailbox-alarm-requires-sbs50-base-station-wireless-long-range
store_origin: OM
region: Oman
---

# 500+ ft long-range signal 4-year battery life IP65 waterproof & UV-resistant Smart Mailbox Alarm, Requires SBS50 Base Station, Wireless Long Range Mailbox Alert, Mailbox Sensor for Delivered Mail, SMA51

**Brand:** x-sense
**Price:** 11.18 OMR
**Availability:** ✅ In Stock

## Summary

> 📬 Never miss a delivery moment again — stay connected, stay ahead!

## Quick Answers

- **What is this?** Smart Mailbox Alarm, Requires SBS50 Base Station, Wireless Long Range Mailbox Alert, Mailbox Sensor for Delivered Mail, SMA51 by x-sense
- **How much does it cost?** 11.18 OMR with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.om](https://www.desertcart.com.om/products/625394282-smart-mailbox-alarm-requires-sbs50-base-station-wireless-long-range)

## 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

- • **Smart Multi-User Sharing:** Share mailbox alerts seamlessly with family or roommates for collective peace of mind.
- • **Built to Brave the Elements:** IP65-rated waterproof design with UV-resistant shell ensures durability through all seasons.
- • **Effortless, Wire-Free Setup:** Stick-on installation with no wiring hassles—get up and running in minutes via intuitive app guidance.
- • **Instant Mail Alerts Anywhere:** Real-time push notifications keep you effortlessly in the loop, no matter where you are.
- • **Unmatched Long-Range Connectivity:** Reliable 2.4 GHz Wi-Fi link covers over 500 feet, conquering brick walls and distance.

## Overview

The X-Sense Smart Mailbox Alarm (SMA51) is a sleek, wireless sensor that instantly notifies you via the X-Sense app when mail arrives. Compatible with various mailbox types, it boasts a robust 500+ ft long-range 2.4 GHz Wi-Fi connection through the SBS50 base station (sold separately). Designed for durability, it features an IP65 waterproof rating, UV-resistant ASA shell, and a replaceable lithium battery lasting up to 4 years. Easy to install with included double-sided tape, it supports multi-user sharing and customizable alerts, making it an essential smart home upgrade for modern mail management.

## Description

desertcart.com: X-Sense Smart Mailbox Alarm, Requires SBS50 Base Station, Wireless Long Range Mailbox Alert, Mailbox Sensor for Delivered Mail, SMA51 : Tools & Home Improvement

Review: Awesome covi - The X-Sense Smart Mailbox Alarm System is a cutting-edge solution for anyone seeking a blend of convenience and security in managing their mail. With real-time push notifications delivered directly to your mobile device, you'll never miss a mail delivery again. Whether you use a curbside, wall-mounted, or cluster mailbox, this versatile system integrates effortlessly into various setups. One of its most impressive features is the long-distance transmission capability, ensuring a strong and reliable connection to the base station. This means you’ll receive timely alerts, even from a considerable distance. The system’s installation is refreshingly simple, requiring no wiring—just the included double-sided tape and user-friendly in-app guidance. Built to last, the X-Sense Mailbox Alarm boasts an IP65 waterproof rating and operates efficiently in extreme temperatures, from 14°F to 140°F. Its durable ASA shell and silicone seal protect against UV damage, guaranteeing longevity even in harsh weather conditions. The replaceable battery, designed to last up to four years with typical usage, further underscores its practicality. Additionally, the system supports multi-user sharing, allowing everyone in your household to stay informed. This thoughtful feature adds to its appeal for families or shared living arrangements. In summary, the X-Sense Smart Mailbox Alarm System combines durability, functionality, and ease of use. Its innovative design not only streamlines mail management but also provides peace of mind, making it a standout choice for modern households.
Review: Great range, needs better adhesive and more customization - Great range from the base station. My mailbox is over 500 feet away and the signal has to deal with my brick house. (It probably goes through a window but still...). My Wi-Fi doesn't reach the mailbox but the base station connects to the mailbox alarm with no problem. The unit consists of two parts. There's the sensor itself which detects light and houses a battery, and that clips on to a mounting bracket that you put on the inside of the door of your standard curb line mailbox. The mounting bracket is attached to the door with a peel and stick adhesive. Unfortunately that adhesive will not hold up to very hot temperatures particularly if your mailbox is in the sun. The temperature went above 90 and I started getting false alarms because the detector was sliding around and detecting subtle changes in light. This isn't hard to fix; you just need and adhesive that can withstand high temperatures. I reattached the mounting bracket with silicone sealant design for fireplace components. Definitely overkill but it was a cheap fix and it got the job done. I'm not sure if that sealant is designed to stand up to winter temperatures but I guess I'll find out in a few months. The bottom line is that you're going to have to think about how you attach the mounting bracket in your climate. The X-Sense app is good in the sense that it's easy to understand and it works. A lot of apps for these types of gizmos are terrible but overall I'm impressed with X-Sense. But it doesn't have much in the way of customization. And that means that whenever the mailbox is opened the alarm goes off. So you're triggering your own alarm every time you open the mailbox to get the mail. There should be a setting that allows the alarm to be triggered only once a day, or mutes it for a while after it initially goes off, or turns it off completely at certain times of day. But overall it works, and the one inconvenience that threatened its usefulness was solved with a higher quality adhesive.

## Features

- Note: Compatible only with 2.4 GHz Wi-Fi (not 5 GHz). Connects to the X-Sense Home Security App via the SBS50 base station (not included)
- 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 (not included) 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
- Customize Your Home Safety System: Includes 1 mailbox alarm (requires SBS50 base station, not included); each base station can connect up to 50 X-Sense devices, providing complete coverage for both your indoor and outdoor properties; customize your device names for easy location and management as needed

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CYZKRH49 |
| Batteries | 1 CR2 batteries required. (included) |
| Batteries Included? | Yes |
| Batteries Required? | Yes |
| Battery Cell Type | Lithium |
| Battery Description | Lithium |
| Best Sellers Rank | #71,369 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #57 in Post-Mount Mailboxes |
| Control Method | App |
| Customer Reviews | 4.3 4.3 out of 5 stars (127) |
| Date First Available | March 25, 2024 |
| Description Pile | Lithium |
| Included Components | 1 Smart Mailbox Alarm (Base Station Required) |
| Item Weight | 2.08 ounces |
| Item model number | SMA51 |
| Manufacturer | X-SENSE |
| Mounting Type | Wall Mount |
| Number of Batteries | 1 CR2 batteries required. (included) |
| Part Number | X-SENSE |
| Product Dimensions | 1.65 x 1.26 x 4.21 inches |
| Sensor Technology | Infrared Sensor |
| Style | Only 1 Alarm (Base Station Required) |
| Voltage | 3 Volts |

## Product Details

- **Brand:** X-Sense
- **Color:** Black
- **Compatible Devices:** Smartphone
- **Power Source:** Battery Powered
- **Product Dimensions:** 3.91"L x 1.06"W x 1.02"H

## Images

![Smart Mailbox Alarm, Requires SBS50 Base Station, Wireless Long Range Mailbox Alert, Mailbox Sensor for Delivered Mail, SMA51 - Image 1](https://m.media-amazon.com/images/I/71d+6EvSzML.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Awesome covi
*by M***N on March 9, 2025*

The X-Sense Smart Mailbox Alarm System is a cutting-edge solution for anyone seeking a blend of convenience and security in managing their mail. With real-time push notifications delivered directly to your mobile device, you'll never miss a mail delivery again. Whether you use a curbside, wall-mounted, or cluster mailbox, this versatile system integrates effortlessly into various setups. One of its most impressive features is the long-distance transmission capability, ensuring a strong and reliable connection to the base station. This means you’ll receive timely alerts, even from a considerable distance. The system’s installation is refreshingly simple, requiring no wiring—just the included double-sided tape and user-friendly in-app guidance. Built to last, the X-Sense Mailbox Alarm boasts an IP65 waterproof rating and operates efficiently in extreme temperatures, from 14°F to 140°F. Its durable ASA shell and silicone seal protect against UV damage, guaranteeing longevity even in harsh weather conditions. The replaceable battery, designed to last up to four years with typical usage, further underscores its practicality. Additionally, the system supports multi-user sharing, allowing everyone in your household to stay informed. This thoughtful feature adds to its appeal for families or shared living arrangements. In summary, the X-Sense Smart Mailbox Alarm System combines durability, functionality, and ease of use. Its innovative design not only streamlines mail management but also provides peace of mind, making it a standout choice for modern households.

### ⭐⭐⭐⭐⭐ Great range, needs better adhesive and more customization
*by S***S on August 16, 2024*

Great range from the base station. My mailbox is over 500 feet away and the signal has to deal with my brick house. (It probably goes through a window but still...). My Wi-Fi doesn't reach the mailbox but the base station connects to the mailbox alarm with no problem. The unit consists of two parts. There's the sensor itself which detects light and houses a battery, and that clips on to a mounting bracket that you put on the inside of the door of your standard curb line mailbox. The mounting bracket is attached to the door with a peel and stick adhesive. Unfortunately that adhesive will not hold up to very hot temperatures particularly if your mailbox is in the sun. The temperature went above 90 and I started getting false alarms because the detector was sliding around and detecting subtle changes in light. This isn't hard to fix; you just need and adhesive that can withstand high temperatures. I reattached the mounting bracket with silicone sealant design for fireplace components. Definitely overkill but it was a cheap fix and it got the job done. I'm not sure if that sealant is designed to stand up to winter temperatures but I guess I'll find out in a few months. The bottom line is that you're going to have to think about how you attach the mounting bracket in your climate. The X-Sense app is good in the sense that it's easy to understand and it works. A lot of apps for these types of gizmos are terrible but overall I'm impressed with X-Sense. But it doesn't have much in the way of customization. And that means that whenever the mailbox is opened the alarm goes off. So you're triggering your own alarm every time you open the mailbox to get the mail. There should be a setting that allows the alarm to be triggered only once a day, or mutes it for a while after it initially goes off, or turns it off completely at certain times of day. But overall it works, and the one inconvenience that threatened its usefulness was solved with a higher quality adhesive.

### ⭐⭐⭐⭐⭐ Great device
*by T***M on October 13, 2025*

Excellent product and price good. Installation and setup with base very easy and works great. Has multiple tone setting and volume adjustment. Loud enough to hear even in large space and has added feature of blinking red light on base module as reminder to check mail if notification missed WiFi range much greater than other products including Ring and several others tested. String steady connectivity up my mailbox which is about 70 feet away.

## Frequently Bought Together

- X-Sense Smart Mailbox Alarm, Requires SBS50 Base Station, Wireless Long Range Mailbox Alert, Mailbox Sensor for Delivered Mail, SMA51
- X-Sense Smart Mailbox Alarm, Wireless Long Range Mailbox Alert, Mailbox Sensor with SBS50 Base Station for Delivered Mail, SMA11
- 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 Oman*
*Store origin: OM*
*Last updated: 2026-03-04*