ORNO OR-DB-MT-156/W, ONDO AC, radio, battery-free, 36 sounds, 200m, white

The wireless doorbell with battery-free button is designed for use in houses, flats, offices, hospitals, shops, etc.. It does not require any bell installation. It is used for sound and light signalling. The bell (receiver) is connected directly to the ~230 V mains socket and the transmitter is powered by an electromechanical transducer and does not require batteries. The learning system function allows you to register additional buttons. The range of the bell in free field is 200m. The receiver has a 4-level volume control and 36 polyphonic ringtones to choose from.