









🚨 Secure smarter, not harder — the future of wireless alerts is here!
The BlackT Electrotech BT51D is a compact, wireless 4-in-1 doorbell and alarm sensor delivering a powerful 120dB alert. Designed for easy peel-and-stick installation, it offers versatile security for homes, offices, and cabins without any wiring. Combining smart contact sensor technology with a sleek design, it ensures instant, reliable protection and convenience.





| Control Method | Touch |
| Noise Level | 120 Decibels |
| Mounting Type | Door Mount |
| Sensor Technology | Contact Sensor |
| Size | Small |
| Manufacturer | Blackt Electrotech |
| Country of Origin | China |
| Item model number | BT51D |
| Product Dimensions | 8 x 3 x 2 cm; 80 g |
| ASIN | B0DBJ2R2K4 |
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