Wireless Door Sensor Chime BITIWEND Alarm Contact Sensor Door Bell for Office/Home/Store,Door Open Chime Window Alarm Operate Range 600ft With 52 Chimes 4 Volume Level,1 Door Sensor+1 Plug-in Receiver

Wireless Door Sensor Chime BITIWEND Alarm Contact Sensor Door Bell for Office/Home/Store,Door Open Chime Window Alarm Operating Range 600ft With 52 Chimes 4 Volume Levels, 1 Door Sensor + 1 Plug-in Receiver Specification of Door Sensor Alarm...