3-mode sounder - chime, continuous chime and siren and 3 volume settings
Extremely simple to set up
Switch on the transmitter, line up the receiver (up to 20m away) and switch on. The receiver will sound whenever the invisible infra-red beam is broken. It can be set to chime once or chime continuously (with volume adjustable to low, medium or high) or set to a continuous high level siren. Each pair features a coded infrared transmission and a switch for high or low power output. Both of the units require three AA batteries or a 6V plug-in mains adaptor each
