General description Battery-free wireless doorbell that generates electricity by pressing to drive wireless signals. This doorbell features a minimalist design, making it simple, elegant, and visually appealing. It can be used with wireless receivers and smartphones, allowing for remote control of electrical equipment. The device supports single, dual, multi-control, and mutual control functionalities, making it versatile for various applications beyond just doorbells, such as switching pagers. Technical specifications Doorbell receiver: Power supply: AC100V-230V 50/60Hz Power consumption: 0.25W Ringtone: 38 ringtones Weight: 56g Ring volume: equal to 50dB/1M Ambient temperature: -10℃ to +45℃ Doorbell transmitter: Transmission distance: open space 150M Radio Frequency: 433 MHz Ambient temperature: -20℃ to +60℃ Plug Type: EU Plug Voltage: AC220V Colour: White Material: ABS Doorbell receiver size: 85mm x 52mm x 43-63mm Doorbell transmitter size: L 67mm x W 33mm x H 18mm Other