An electronic entrance-monitoring device, which creates an invisible infrared beam between the units up to 4 metres or up to 20 metres apart. Alarms when someone moves through the beam, i.e. alerting a carer if someone has wandered from a bedroom at night. There are three volume settings and alarm tones and it is easy to install, no fixing required. Easy to align with LED indicators lights on both units. Each unit uses 1 x 9v battery (not included) with low battery warning signal.
Dimensions 95 x 70 x 25mm (3¾ x 2¾ x 1").
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