Description:Item Type: Door BellReceiver: Plug in directly, the receiver supports AC 100-240V voltageTransmitter battery: 1 * 12V23A battery (excluding)Power supply specifications: EU specificationsColors: White, BlackWeight: 150g (set)Scope of application: 300mWireless remote control distance: 300 meters in open space (superheterodyne technology)Size: receiver: 95X65X24MM, transmitter: 75X51X20MMPower consumption: 1wPower supply mode: 110V-220VMaterial: ABS + electronic componentsNumber of ringtones: 38Features- Top-notch equipment- Signal penetration 300m- Waterproof designThe package includes:* transmitter1 receiver1 * English instructionsRemarks:1-2mm error might exist due to manual measurements, please kindly understand. The colors deviation might differ due to different monitor settings.We provide you with the best product and service. If you have any problems, please let us know, and we will solve the problem as quickly as possible. Thank you very much.