Compact Door Alarm with 16ft X 12ft Detection Area, 70dB Volume - 9V Battery Operated Alarm for Smaller Stores music_update_2021 The headset sits on top

The headset sits on top of the head so it is stable and wont fall off

5 inches ‎5

where the cover plate screws fasten together

Clip Connector

The diode would dim as the voltage reduces

Compact Door Alarm with 16ft X 12ft Detection Area, 70dB Volume - 9V Battery Operated Alarm for Smaller Stores music_update_2021 The headset sits on topCompact Door Alarm with 16ft X 12ft Detection Area, 70dB Volume 9V Battery Operated Alarm for Smaller Stores A stand alone, self contained, and incredibly easy to install entrance alert, the SL 40 detects motion at a door opening or other monitored area and creates a gentle alert sound that comes directly from sensor. Product Features This Entry Chime Will Chime When a Customer Walks Through the Monitored Zone. Made in China Assembled In California