Wireless Door Cordless Wireless Bell Mains Plug In Portable Chime Waterproof Wireless Home Doorbell Smart Remote 300M LED Light Battery Button Calling Door Bell EU Plug 38 Chime 3 Volume 1 Bell 1 Receiver UK Plug Highlights: - Touch the button configuration, superheterodyne learning code on the code mode - The transmitter without screw chuck design to achieve waterproof and dustproof - Double-sided stability of the PCB, the chip standby sleep up to micro-level - The transmitter 12V23A battery factory pre-installed (not include battery) - The use of microprocessor control, double-sided PCB micro-power design - The frequency of 433MHz, can be customized other frequencie - Receiving distance:300M(open area) - Volume:3 files(can be mute) 0-85db - Ringtones:38 pcs - Transmitter size:75X51X20MM - Receiver size:95X65X24MM - Receivers Rated voltage : AC 110V-220V -240V​