1 Music tones : 48 music select from world wireless doorbell
2 wireless doorbell Working range : 180m ~ 300m wifi doorbell.
3 Volume : 4 adjustable levels of 50db ~ 85db.
4 Plug and play : no wiring required, no labor involved wireless doorbell
5 Easy Installation: Wire free and environmentally friendly .
6 110V-220V for Receiver. 12V/ 23A transmitter for wifi doorbellwireless doorbell for apartment
7 Material: All material comply with RoHS requirement and approved by CE FCC.
8 ODE/ OEM service and Competitive price wireless doorbell.