Mfg. Projects Unl.3 - 20VDC (5mA @ 12VDC)Gray ABS Plastic case1-1/8” dia. X 1” Frequency: 3500 Hz, 95 dbPanel or flange mount with red andblack wires.
Mfg. Projects Unl.3 - 16VDC @ 14 - 70mAGray ABS Plastic case2” dia. X 1-1/2”Sound level adjustable by mechanicalvane. Up to 15 db.Frequency: 2545 - 2650 Hz, 85 - 95 dbFlange mounting with 5-1/2” leads.