Long-distance Wall-through Wireless Electronic Doorbell $ 8.43 Product information: Power type: CR2032 Operating temperature:-20C to 60C Waterproof grade: IP44 waterproof Operating voltage: AC 100~250V 50/60Hz Operating frequency: 433.92MHz Standby power consumption: 0.25W Specifications: White European standard one to one (1 transmitter and 1 receiver); White European standard two drag one (2 transmitter and 1 receiver); White European standard one drag two (1 transmitter and 2 receivers); black European standard one to one (1 transmitter and 1 receiver); Black European standard two drag one (2 transmitter and 1 receiver); Black European standard one drag two (1 transmitter and 2 receivers) Packing list: 1*Electronic Doorbell Product Image: