This clever, cordless wirelss alarm device alerts you when anyone enters your garden, driveway, outhouse, garage or entrance. Its clever, weatherproof infra-red sensor detects heat or movement up to 100ft away and sends a radio signal to the alarm receiver anywhere in your house. The receiver chimes alerting you to a visitor or intruder. Runs on 3 x AA and 1 x 9V batteries or optional mains adaptor (not supplied).