1. Product name:wireless door bell
2.Material: ABS
3.Weight: 210g
4. Color: white
5.Size: transmitter 78*48*20mm, receiver 80*76*24mm
6. Plug: Chinese/American/Japanese/Europe/English
7. Working temperature: -30°C to 70°C,
8.Working frequency: 433.92MHz±75KHz
9. Product features:
1) 36 pieces of music are optional, four-level volume is adjustable
2) 1 to 1 work, the same frequency garbled, to avoid false alarms
3) Strong penetrating power, stable signal, no wiring, remote transmission