Whelen Back-Up Alarm, 97dB, 12/24 VDC. All Whelen's rugged back-up alarms have passed a one million cycle test, so you can be confident in your equipment for years to come.

Features:

• Meets O.S.H.A., Bureau of Mines and State regulations
• Sound Level: 97dB
• Combination 12/24 VDC
• Easy to install, with years of field-tested, proven reliability
• Manufacturer's 12-Month Warranty from Whelen