The Security Beam from Seton is the perfect entry/exit detector for your business. The buzzer sounds each time the infra-red beam is broken. With a choice of distance ranges from two to eight metres, it is ideal for small or larger areas. The plug in power supply (included) and easy DIY installation means you can set up the Security Beam in minutes. Ideal for small businesses, factories, reception areas or shopfronts. Can be heard up to 30m away. 94dB sound.