... the display for easier viewing in low light conditions5,Reliable RF communication utilising 433 MHz band with 1 % duty cycle limit ... : 123x90x48mm H x W x DRF1, RF operation band: ISM (433) MHz, 1% duty cycle2, RF communication range: 30 meters in a ... air time and avoid collisions4, Blocking immunity: Receiver class 25, RF binding method: Factory pre-bound with the room unit Wireless Thermostat