Provides leak detection alarming;Trips immediately with the presence of pooled oil;Velcro mounted for easy installation;Pulsating 85 db alarm. (every 10 seconds);Low battery warning alarm;Easy self check design;Reliable spring loaded float design;US Patent 6,414,598 CSA approved for Can/CSA. C22.2 No. 205 ANSI/UL Std no. 464;Five year warranty on trays and alarms;Recommended protection by Insurers