Retro-reflective design
Perfect for monitoring an entrance or use as an entrance indicator
Will make "ding-dong" sound or siren sound when the beam is interrupted
Speaker volume can be adjusted or turned off; When in siren mode, sounding time is adjustable from 3 to 30 sec
All components plug into each other. No hard wiring required. 32ft Cable from speaker to sensor
Retro-Reflective Alert System comes with the following: NIR retro-reflective sensor, reflector, Speaker, 9VDC 200mA power adapter. 6ft cable