Buy anything from 5,000+ international stores. One checkout price. No surprise fees. Join 2M+ shoppers on Desertcart.
Desertcart purchases this item on your behalf and handles shipping, customs, and support to Japan.
🚨 Stay ahead of every step with BT51A — where security meets smart welcome!
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.
| ASIN | B0DBL4D681 |
| Audible Noise | 110 Decibels |
| Battery Description | Alkaline |
| Best Sellers Rank | #6,134 in Home Improvement ( See Top 100 in Home Improvement ) #10 in Motion Detectors |
| Brand | Blackt Electrotech |
| Built-In Media | Remote |
| Colour | white |
| Control Method | Remote |
| Country of Origin | China |
| Customer Reviews | 3.7 out of 5 stars 131 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 |
J**R
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.
V**T
Good
Very good product allmost but range is only 8 feet other function like sound, and bell is very good
J**B
No. 1 sensor alarm product.
Received the order ontime. Super packing and amazing product. Thanks a lot🙏
N**I
Limited range 6-8 feet only.Not so good
It does not work beyond 8 feet,no return facility given,works OK within 6-8 feet.Wrong claim given in specification of product. Not good enough.
R**S
Not working after 2-3 months
Not good
R**H
Volume, battry backup, size, motian quality all good
Good product
P**P
Sensing is less
Given range of sensing is 6 mtr but actually it is very less.
P**R
Nice quality
Very good product
Trustpilot
4 days ago
1 day ago