--- product_id: 650226288 title: "BT51A Wireless Motion Sensor Alarm with Intelligent Welcom..." brand: "blackt electrotech" price: "124 zł" currency: PLN in_stock: true reviews_count: 8 category: "Blackt Electrotech" url: https://www.desertcart.pl/products/650226288-bt51a-wireless-motion-sensor-alarm-with-intelligent-welcom store_origin: PL region: Poland --- # 8m Infrared detection range 2-in-1 security & welcome modes 110dB adjustable alarm volume BT51A Wireless Motion Sensor Alarm with Intelligent Welcom... **Brand:** blackt electrotech **Price:** 124 zł **Availability:** ✅ In Stock ## Summary > 🚨 Stay ahead of every step with BT51A — where security meets smart welcome! ## Quick Answers - **What is this?** BT51A Wireless Motion Sensor Alarm with Intelligent Welcom... by blackt electrotech - **How much does it cost?** 124 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/650226288-bt51a-wireless-motion-sensor-alarm-with-intelligent-welcom) ## 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 - • **Dual-Mode Alert System:** Seamlessly switch between security alarm and warm welcome tones to suit your space and mood. - • **Customizable Volume Control:** Four volume levels up to 110dB let you tailor alerts from discreet to attention-grabbing. - • **Effortless DIY Installation:** Compact design with wall mount or tape options—setup in minutes, no tools required. - • **Versatile Placement Options:** Ideal for homes, offices, gates, and retail spaces—security and hospitality in one sleek device. - • **Smart Infrared Motion Detection:** Sensitive sensor covers an 8-meter radius, catching every movement with precision. ## Overview The BT51A Wireless Motion Sensor Alarm by Blackt Electrotech combines an 8-meter infrared motion detector with a powerful 110-decibel alarm and customizable welcome tones. Designed for easy installation and versatile use, it offers dual functionality as both a security alert and a friendly doorbell, making it perfect for modern homes and professional spaces seeking smart, reliable protection. ## Description Product Description Blackt Electrotech BT51A Wireless Motion Sensor Alarm with Intelligent Welcome Doorbell The Blackt Electrotech BT51A Wireless Motion Sensor Alarm is an all-in-one security solution designed to enhance the safety of your home or business. Featuring an integrated intelligent welcome doorbell, infrared motion detection, gate alert alarm, and a remote control for easy operation, this system offers comprehensive protection and peace of mind. Whether you're at home or away, the BT51A ensures you're always alerted to activity around your property, providing a modern, hassle-free security solution for daily protection. Gate Alert Alarm for Extra Protection The gate alert alarm function allows you to monitor activity around your gate or property boundary. When movement is detected near the gate, the system sounds an alert, keeping you informed about any potential threats or visitors. This added feature ensures that no one approaches your property unnoticed, providing complete perimeter security for your home. Easy Installation for Instant Protection The Blackt Electrotech BT51A is designed with ease of installation in mind. With no complicated wiring required, you can quickly set up the system and begin using it immediately. The wireless design ensures a hassle-free setup, so you can start protecting your property without the need for professional installation. ## 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 | #5,062 in Home Improvement ( See Top 100 in Home Improvement ) #11 in Motion Detectors | | Brand | Blackt Electrotech | | Built-In Media | Remote | | Colour | white | | Control Method | Remote | | Country of Origin | China | | Customer Reviews | 3.8 out of 5 stars 122 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 | | Mfr Part Number | BT51A | | Model Number | BT51A | | Mounting Type | Wall Mount | | Packer Contact Information | Blackt Electrotech | | Power Source | Battery Powered | | Sensor Technology | Infrared Sensor | | Size | Small | | Smart Home Compatibility | Not Smart Home Compatible | | Voltage | 5 Volts | ## Product Details - **Battery Description:** Alkaline - **Brand:** Blackt Electrotech - **Colour:** white - **Power Source:** Battery Powered - **Voltage:** 5 Volts ## Images ![BT51A Wireless Motion Sensor Alarm with Intelligent Welcom... - Image 1](https://m.media-amazon.com/images/I/51AJw6NMMVL.jpg) ![BT51A Wireless Motion Sensor Alarm with Intelligent Welcom... - Image 2](https://m.media-amazon.com/images/I/61+De4PIaGL.jpg) ![BT51A Wireless Motion Sensor Alarm with Intelligent Welcom... - Image 3](https://m.media-amazon.com/images/I/61B2U0KkPbL.jpg) ![BT51A Wireless Motion Sensor Alarm with Intelligent Welcom... - Image 4](https://m.media-amazon.com/images/I/619PfQ5+ziL.jpg) ![BT51A Wireless Motion Sensor Alarm with Intelligent Welcom... - Image 5](https://m.media-amazon.com/images/I/71AI7K1msuL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by J***R on 30 October 2025* ### ⭐⭐⭐⭐ Review *by V***T on 24 July 2025* ### ⭐⭐⭐⭐⭐ Review *by J***B on 28 November 2025* ## Frequently Bought Together - Blackt Electrotech BT51A Wireless Motion Sensor Alarm with Intelligent Welcome Doorbell, Infrared Detector, Gate Alert Alarm, Remote Control, Easy Install for Daily Safety Protection - Panasonic 9 Watt Motion Sensor Led B22D Bulb for Home with 3 Mtr Radius Sensor Area,Auto Off After 15 Sec Comes with 30000 Bh Life and 1 Yr Warranty --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pl/products/650226288-bt51a-wireless-motion-sensor-alarm-with-intelligent-welcom](https://www.desertcart.pl/products/650226288-bt51a-wireless-motion-sensor-alarm-with-intelligent-welcom) --- *Product available on Desertcart Poland* *Store origin: PL* *Last updated: 2026-04-25*