to ring the bel Smart wireless doorbell with adjustable volume in 4 levels, even if it is used in a complicated house type, the penetrating power of its ringtone can also know that someone is visiting. Honeycomb sound cavity design, make the ringtone more pleasant The ringing sound covers an area of about 300m. Easy to instal,it sounds when you it, and the ergonomic button is easy to The pressing area of the button is enlarged, which makes it easier to , and even the high-grade damping sense, the elderly and children can easily ring the doorbell. Long launch distance 2 floors without pressure 150m house environment The first floor to the second floor building transmission without pressure Low power design The standby power consumption of receiving and ringing is low, about 3 kWh a year Button battery life, 3-5 times a day, estimated to be available for about 2 years Does not occunyadjacent sockets Bell width 48mm thick 15mm Plug in the socket. saves space and does not affect the normal use of other plugs 4 leveis of volume can be adjusted. 32 ringtones optional Built-in 32 high-quality ringtones to choose from Four levels of volume can be adjusted freely Plug Type:EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on Color: White Voltage: AC100-240V Material: ABS Package Contents: 1 x receiver 1 x button Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.