---
product_id: 650226288
title: "Blackt Electrotech BT51A Wireless Motion Sensor Alarm with Intelligent Welcome Doorbell, Infrared Detector, Gate Alert Alarm, Remote Control, Easy Install for Daily Safety Protection"
brand: "blackt electrotech"
price: "₪76"
currency: ILS
in_stock: true
reviews_count: 8
category: "Blackt Electrotech"
url: https://www.desertcart.co.il/products/650226288-blackt-electrotech-bt51a-wireless-motion-sensor-alarm-with-intelligent-welcome
store_origin: IL
region: Israel
---

# 8m infrared detection range 110dB adjustable alarm volume easy no-tool installation Blackt Electrotech BT51A Wireless Motion Sensor Alarm with Intelligent Welcome Doorbell, Infrared Detector, Gate Alert Alarm, Remote Control, Easy Install for Daily Safety Protection

**Brand:** blackt electrotech
**Price:** ₪76
**Availability:** ✅ In Stock

## Summary

> 🚨 Stay ahead of every visitor and intruder with smart alerts that keep you connected and secure.

## Quick Answers

- **What is this?** Blackt Electrotech BT51A Wireless Motion Sensor Alarm with Intelligent Welcome Doorbell, Infrared Detector, Gate Alert Alarm, Remote Control, Easy Install for Daily Safety Protection by blackt electrotech
- **How much does it cost?** ₪76 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.il](https://www.desertcart.co.il/products/650226288-blackt-electrotech-bt51a-wireless-motion-sensor-alarm-with-intelligent-welcome)

## Best For

- blackt electrotech enthusiasts

## Why This Product

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

## Key Features

- • **Versatile Use Cases:** Ideal for homes, offices, shops, and gates—because safety should never be location-bound.
- • **Effortless Setup Anywhere:** Mount on walls or place on surfaces with no tools needed—security made simple.
- • **Customizable Volume Control:** Four volume levels up to 110dB let you tailor alerts from subtle to unmistakable.
- • **Dual-Mode Security & Welcome:** Seamlessly switch between alert and greeting modes to suit your vibe.
- • **Smart Infrared Motion Detection:** Detects movement up to 8 meters for proactive, reliable security coverage.

## Overview

The Blackt Electrotech BT51A is a wireless motion sensor alarm featuring an 8-meter infrared detection range and a powerful 110-decibel alarm with four adjustable volume settings. It doubles as an intelligent welcome doorbell with multiple tone options and supports easy installation via wall mount or adhesive tape. Powered by 3 AAA batteries or micro USB, it’s designed for versatile use in homes, offices, and commercial spaces to enhance daily safety and convenience.

## Description

Blackt Electrotech BT51A Wireless Motion Sensor Alarm with Intelligent Welcome Doorbell, Infrared Detector, Gate Alert Alarm, Remote Control, Easy Install for Daily Safety Protection : desertcart.in: Home Improvement

Review: Allover funcation and utility - Very nice useful product. Having multiple usages like: When ever anyone is passing through its range,it gives the alert like: Any animal is passing, you can set the alert tone as dog barking If you want to welcome your guest, you car set the Welcome tone. Even you can set the tone of call bell. The Welcome tone is having multiple languages of your choice. It operates on 3 AAA Batteries or even with micro usb. I recommend this product may be used and installed near your main gate or even at front door of your house as you wish. Installation is very easy,anyone can do it on their own.
Review: Good - Very good product allmost but range is only 8 feet other function like sound, and bell is very good

## Features

- 🔄 [2-in-1 Functionality]: Can be used both as a security alert system and in welcome mode, offering versatility for different use cases.
- 🔊 [Flexible Volume Adjustment]: Choose from four adjustable volume levels (0 to 110 decibels) for personalized comfort and security.
- 🔍 [Sensitive Infrared Sensor]: Detects motion within an 8-meter range, enhancing security and providing alerts in various locations.
- 🚨 [Accurate & Effective Security Alert]: The 110-decibel alarm effectively notifies occupants of guests or intrusions, ensuring preparedness and peace of mind.
- 🏠 [Wider Range of Applications]: Perfect for front entrances, galleries, gates, walkways, apartments, offices, hotels, stores, and more.
- 🛠️ [Simple Installation Design]: Easy to set up—place the detector on a table or attach with double-sided tape for a quick and secure installation.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0DBL4D681 |
| Audible Noise | 110 Decibels |
| Battery Description | Alkaline |
| Best Sellers Rank | #3,049 in Home Improvement ( See Top 100 in Home Improvement ) #7 in Motion Detectors |
| Brand | Blackt Electrotech |
| Built-In Media | Remote |
| Colour | white |
| Control Method | Touch |
| Country of Origin | China |
| Customer Reviews | 3.8 out of 5 stars 102 Reviews |
| Importer Contact Information | Blackt Electrotech |
| Item Type Name | Motion Sensor Detector Gate Alert Alarm |
| Item Weight | 150 Grams |
| Manufacturer | Blackt Electrotech |
| Maximum Range | 8 metres |
| Mounting Type | Wall Mount |
| Packer Contact Information | Blackt Electrotech |
| Power Source | Battery Powered |
| Sensor Technology | Infrared Sensor |
| Voltage | 5 Volts |

## Product Details

- **Battery Description:** Alkaline
- **Brand:** Blackt Electrotech
- **Colour:** white
- **Power Source:** Battery Powered
- **Voltage:** 5 Volts

## Images

![Blackt Electrotech BT51A Wireless Motion Sensor Alarm with Intelligent Welcome Doorbell, Infrared Detector, Gate Alert Alarm, Remote Control, Easy Install for Daily Safety Protection - Image 1](https://m.media-amazon.com/images/I/51AJw6NMMVL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Allover funcation and utility
*by J***R on 30 October 2025*

Very nice useful product. Having multiple usages like: When ever anyone is passing through its range,it gives the alert like: Any animal is passing, you can set the alert tone as dog barking If you want to welcome your guest, you car set the Welcome tone. Even you can set the tone of call bell. The Welcome tone is having multiple languages of your choice. It operates on 3 AAA Batteries or even with micro usb. I recommend this product may be used and installed near your main gate or even at front door of your house as you wish. Installation is very easy,anyone can do it on their own.

### ⭐⭐⭐⭐ Good
*by V***T on 24 July 2025*

Very good product allmost but range is only 8 feet other function like sound, and bell is very good

### ⭐⭐⭐⭐⭐ No. 1 sensor alarm product.
*by J***B on 28 November 2025*

Received the order ontime. Super packing and amazing product. Thanks a lot🙏

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*Product available on Desertcart Israel*
*Store origin: IL*
*Last updated: 2026-02-06*