Nexa MLR-1923/SET Wireless doorbell separate receiver, Plug-inPlug-in doorbell with blue LED indicator. In addition to functioning as a normal doorbell with a push button (push button sold as an accessory), it can also receive signals from a motion detector and magnetic contact or remote control if desired. There are 6 selectable tones so different transmitters can give different ringtones. The sound level can be set in 4 different levels; High – Middle – Low – Mute.- Plug-in (220-240 V)- 32 memory slots- Easy installation- 6 selectable ringtones- 4 sound levels- Up to 150 meter rangeSpecificationsPower source door bell: 220-240 V ~50HzProtocol: System Nexa (433.92 MHz)Range: Up to 150 mPower consumption: < 1 WIP classification: Push button IP44Dimensions of doorbell (W x H x D): 59 x 100 x 37 mmDimensions of push button (W x H x D): 30 x 70 x 15 .5 mmProduct Document