Wireless Network Doorbell 36 Sounds 200m Ondo

technical data:general:transmission type: wirelessrange in open area: 200mcolor: blackpossibility of expansion with additional transmitters: yesreceiver:receiver supply voltage: 230v~ 50hzreceiver power supply type: mainsnumber of ring tones: 36ring volume level (db): 60-90volume adjustment: yesoptical signaling: yesreceiver dimensions (width / height / depth [mm]): 81 / 81 / 35transmitter:transmitter power supply type: battery-freeip protection rating: ip44transmitter dimensions (width / height / depth [mm]): 50 / 82 / 21.5frequency: 433.92mhzother features: learning systemwireless doorbell with 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 an open area is 200m. The receiver has a 4-level volume control and 36 polyphonic ringtones to choose from.**photos are for illustrative purposes only.