







๐ช๐ Elevate your home security with invisible, instant smart sensing!
The Shelly BLU Black Bluetooth Door/Window Sensor is a compact, battery-powered smart sensor that detects door and window openings with immediate Bluetooth alerts. Featuring integrated LUX and tilt sensors, it supports hub-free control via the Shelly app and voice assistants, enabling seamless automation and energy-saving scenarios. With up to 5 years of battery life and a sleek, discreet design, it offers professional-grade security and smart home convenience tailored for modern living spaces.






| Manufacturer | Shelly Group |
| Part number | 661 |
| Item Weight | 22 g |
| Product Dimensions | 9.5 x 2 x 5 cm; 22 g |
| Batteries | 1 CR2430 batteries required. (included) |
| Item model number | 3800235266618 |
| Color | Black |
| Power source type | Battery Powered |
| Item Package Quantity | 1 |
| Temperature Range | 1E+2 Degrees Fahrenheit |
| Plug Profile | Wall Mount |
| Included components | 1 x Shelly Blu Door/Window - Black, User Manual |
| Batteries Included? | Yes |
| Batteries Required? | Yes |
| tech_spec_battery_description_toys | Lithium, Lithium Manganese Dioxide |
| Battery life | 5 years |
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