Product Name: Digital Message Recordable Wireless Doorbell 
Melodies :
Remote Control: 30-50m
Working temperature: -20℃-50℃
No wiring, no installation
Application:

For receiver:
Quiescent current: 0.86mA
Working current: 150-178mA
Low power consumption: 3.87mW
Volume: > = 80dB
Battery requirement: 3"AAA"

For transmitter
Quiescent current: 0A
Working current: 140mA
Transmitting power: 0.63W
Battery requirement: 3"AAA"

Packing
Packing: Blister, 120 pieces/carton
Carton measurement:
Minimum purchase order: 45*40*31cm