Wireless Remote DoorBell Button:
| Working Power | Includes Button Batteries (Already includes for your convenient using) |
| Wireless Frequency | 433MHz |
| Detecting Distant | 50m-70m |
| Color | Black & Silver, Looks Tiny & Great~ |
| Size | 45mm Diameter Round (It is about the size of the Digoo M1Q lens.) |
| Convenient Function | Stick one near your door, when some one press it. |