LAMPHUS SoundAlert SABA20 Back-Up Alarm - 97 dB 12-48V DC SAE J994 Class C User Manual available for download under Product Information Details Compliant with SAE J994 Type C, CE, E11 Certification Heavy duty construction. IP67 Waterproof Rating for Dust Tight & Water Immersion up to 1 Meter. 97dB Sound Compression Level; Reverse Polarity Protection