1. 868MHz wireless doorbell 2. 100m remote range 3. CE approved for doorbell 4. Easy to install, Easy to move Available with 32 sounds and 24 polyphonicLED indicator in transmitter and receiverSpeaker in receiver with volume settingWaterproof transmitterTransmitter requires: 1 x 3.0Vdc CR2032 batteryReceiver requires: 2 x 1.5V AA batteries100m operating radius in open air 868MHz transmitter frequencyCE and RoHS certified

868MHz digital wireless doorbell