Kaito 2 in 1 Kit Battery Free Wireless Doorbell Kit No Battery Needed for both receiver and transmitter, 1 Battery Free Push Button with 2 Plug in Doorbells, Ranges long.

The new Kaito AG102N-G2 is a wireless doorbell with 1 Transmitter button triggers (rings) and 2 Receiver (chime units). Unlike traditional doorbell, this AG102N-G2 model does not require battery to operate. Simply plug in the receivers into an outlet and hear your doorbell ring when you’re outside, in the shower, or on a different floor. The wireless range reaches up to a 50 meter distance and offers high quality sound with adjustable volume levels and 25 ringtones. In addition, it is waterproof that can stand against rain. Finally, it comes with 3M self sticker and screws needed to put on the wall for easy installation.
Specifications:
Certificate: CE Color: white
Material: ASA & ABS plastic
Power supply: receiver: AC100-240V, 50~60Hz;
Transmitter: self-powered Ideal transmission distance (open field): 160m
Radio frequency: 433MHz
Sound level: 60dB-85dB (at 1m/ 3ft)
Power consumption: ＜200mw
Transmitter operating temperature: -40 to 60 Celsius degree Receiver operating temperature: -10 to 40 Celsius degree
Transmitter size: 8.0 * 8.0 * 1.5 cm/ 3 1/4 * 3 1/4 * 0.5 inches
Transmitter weight: 70g/ 2.0oz
Receiver size: 8.0 * 8.0 * 2.7cm/ 3 1/4 * 3 1/4 * 1 inches
Receiver weight: 86g/ 3oz
Package size: 10* 10 * 10 cm/ 4 * 4 * 4 inches
Package weight: 222g/ 7.8oz