General description Battery-free wireless doorbell that generates electricity through pressing, eliminating the need for batteries or wiring. Its minimalist design is simple and elegant, making it visually appealing for any home. Technical specifications Doorbell receiver power supply: AC100V-230V 50/60Hz Power consumption: 0.25W Ringtone options: 38 ringtones Weight: 56g Ring volume: 50dB at 1M Ambient temperature range for receiver: -10℃ to +45℃ Doorbell transmitter transmission distance: 150M in open space Radio frequency: 433 MHz Ambient temperature range for transmitter: -20℃ to +60℃ Plug type: US Plug Voltage: AC110V Color: Black Material: ABS Doorbell receiver dimensions: 85mm x 52mm x 43-63mm Doorbell transmitter dimensions: 67mm x 33mm x 18mm Compatibility and accessories Compatible with wireless receivers and smartphones Can be used with switches and other receiving equipment Usage Can be used as a doorbell or for switching pagers Supports single control, dual control,