---
product_id: 599552438
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: "284 zł"
currency: PLN
in_stock: true
reviews_count: 10
category: "X Sense"
url: https://www.desertcart.pl/products/599552438-x-sense-smart-mailbox-alarm-wireless-long-range-mailbox-alert
store_origin: PL
region: Poland
---

# 50m long-range wireless 4-year replaceable battery life IP65 waterproof & weatherproof X-Sense Smart Mailbox Alarm, Wireless Long Range Mailbox Alert, Mailbox Sensor with SBS50 Base Station for Delivered Mail, SMA11

**Brand:** x-sense
**Price:** 284 zł
**Availability:** ✅ In Stock

## Summary

> 📬 Stay ahead of the mail game—smart alerts for the savvy professional!

## 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?** 284 zł with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/599552438-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

- • **Built to Brave the Elements:** IP65-rated waterproof casing and UV-resistant shell ensure flawless performance rain or shine.
- • **Instant Mail Alerts, Anywhere:** Get real-time push notifications the moment your mail arrives—never miss a delivery again.
- • **Robust Long-Range Connectivity:** Reliable 2.4 GHz Wi-Fi connection up to 50 meters, even through walls and obstacles.
- • **Customizable & Multi-User Friendly:** Share alerts with family or colleagues, choose from 5 ringtones, and manage up to 50 devices via the X-Sense app.
- • **Effortless Setup & Wireless Freedom:** 100% wire-free design with easy double-sided tape installation—set up in minutes, no tools required.

## Overview

The X-Sense Smart Mailbox Alarm is a sleek, wireless sensor system designed to notify you instantly when mail is delivered. Featuring a robust 50-meter wireless range, 4-year battery life, and IP65 weatherproof durability, it connects seamlessly via 2.4 GHz Wi-Fi to the X-Sense app. Perfect for various mailbox types, it offers multi-user sharing, customizable alerts, and easy installation, making it an essential smart home upgrade for busy professionals who value convenience and security.

## Description

desertcart.com: X-Sense Smart Mailbox Alarm, Wireless Long Range Mailbox Alert, Mailbox Sensor with SBS50 Base Station for Delivered Mail, SMA11 : Tools & Home Improvement

Review: I would buy it again - t’s great to find a very useful item at a great price and this mailbox alarm is no exception. Our mail box is about 50 to 60 feet away, with a slight bend in the line of sight and a tree and brick wall in the way. Today the temp is 13 deg Fahrenheit and it worked like a charm. The base unit is in the entryway and has a green x on top when set. The x turns red when triggered and is reset by pressing a button on the back of the base unit. Battery life is stated to be about 4 years and is replaceable. Installation and setup is very easy. The unit emits a tone and the red x flashes when the mailbox door in opened. The ring tone can be changed with 5 different tones. There is also an app that notifies you even when away. My only suggestion (not complaint) would be to allow reseting the unit from the app. This would be great if I couldn’t get to the base unit to reset it if I was away or another part of the house. If necessary I would buy this mailbox alarm again.
Review: Great alarm - Compact, easy to install on the mailbox, easy set up (add the base station AND the sensor through the app, lol) Works great! We have roughly a 200 ft range from the base station to the mailbox at our office. No problems with connectivity. I had to use the second adhesive strip because I needed to move the sensor and it was VERY hard to remove, VERY good adhesive lol

## Features

- Note: Compatible only with 2.4 GHz Wi-Fi (incompatible with 5.0 GHz); connects to the X-Sense Home Security App via the included base station
- 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
- Customize Your Home Safety System: Includes 1 mailbox alarm and 1 SBS50 base station; each base station can add 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 | B0CPLQ16K7 |
| Batteries | 1 CR2 batteries required. (included) |
| Batteries Included? | Yes |
| Batteries Required? | Yes |
| Battery Cell Type | Lithium |
| Battery Description | Lithium |
| Best Sellers Rank | #18,128 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #18 in Post-Mount Mailboxes |
| Control Method | App |
| Customer Reviews | 4.3 4.3 out of 5 stars (1,413) |
| Date First Available | December 11, 2023 |
| Description Pile | Lithium |
| Included Components | 1 X Smart Mailbox Alarm, 1 X SBS50 Base Station, 1 X User Manual |
| Installation Method | Pre-paste |
| Item Package Quantity | 1 |
| Item Weight | 7.8 ounces |
| Item model number | SMA11 |
| Manufacturer | X-SENSE |
| Maximum Range | 50 Meters |
| Mounting Type | Protruding |
| Noise Level | 100 Decibels |
| Number of Batteries | 1 CR2 batteries required. (included) |
| Part Number | X-SENSE |
| Product Dimensions | 3.91 x 1.06 x 1.02 inches |
| Sensor Technology | Infrared Sensor |
| Style | Alarm |
| UPC | 850053675409 |
| Usage | Outside; Professional |
| Wattage | 1000 milliamp_hours |

## Product Details

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

## 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)

## Available Options

This product comes in different **Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ I would buy it again
*by J***N on January 20, 2026*

t’s great to find a very useful item at a great price and this mailbox alarm is no exception. Our mail box is about 50 to 60 feet away, with a slight bend in the line of sight and a tree and brick wall in the way. Today the temp is 13 deg Fahrenheit and it worked like a charm. The base unit is in the entryway and has a green x on top when set. The x turns red when triggered and is reset by pressing a button on the back of the base unit. Battery life is stated to be about 4 years and is replaceable. Installation and setup is very easy. The unit emits a tone and the red x flashes when the mailbox door in opened. The ring tone can be changed with 5 different tones. There is also an app that notifies you even when away. My only suggestion (not complaint) would be to allow reseting the unit from the app. This would be great if I couldn’t get to the base unit to reset it if I was away or another part of the house. If necessary I would buy this mailbox alarm again.

### ⭐⭐⭐⭐⭐ Great alarm
*by L***. on February 4, 2026*

Compact, easy to install on the mailbox, easy set up (add the base station AND the sensor through the app, lol) Works great! We have roughly a 200 ft range from the base station to the mailbox at our office. No problems with connectivity. I had to use the second adhesive strip because I needed to move the sensor and it was VERY hard to remove, VERY good adhesive lol

### ⭐⭐⭐⭐⭐ Works great after 2+ years
*by P***E on February 28, 2026*

I purchased this mailbox alarm over 2 years ago. It still works great! The step-by-step set up was very simple, even for a senior, using the free phone app. The included adhesive for the sensor that attaches to the mailbox door has stood up well in the Southern California heat. I've only needed to replace the battery in the mailbox sensor once in 2 years. This purchase was worth every penny! You won't be disappointed.

## 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 Poland*
*Store origin: PL*
*Last updated: 2026-03-18*