Wireless Doorbell 230v Battery-free 2 Receivers Ondo 2

technical data:color: blacktransmission type: wirelesspossibility of expansion with additional transmitters: yesrange in open area: 200mother features: learning systemreceiverreceiver power supply type: mains (230v)number of ring tones: 36ring volume level (db): 60-90volume adjustment: yesoptical signaling: yesreceiver dimensions - width (mm): 81 mmreceiver dimensions - height (mm): 81 mmreceiver dimensions - depth (mm): 35 mmtransmitter:transmitter power supply type: battery-freebattery included: notransmitter protection class: ip44 transmitter dimensions - width: 50 mm transmitter dimensions - height: 82 mm transmitter dimensions - depth: 21.5 mmthis set of two wireless doorbells with a battery-free button is intended for use in homes apartments offices hospitals shops etc. It does not require a bell installation. It is used for sound and light signaling. The doorbell (receiver) is plugged directly into a ~230v mains socket and the transmitter is powered by an electromechanical transducer and does not require batteries. The learning system function allows for logging in additional buttons. The doorbell range in open areas is 200 m. The receivers have a 4-level volume control and 36 polyphonic ringtones to choose from.**illustrative photos.