TDR Series Dual Output Time Delay Relay (2x80 A)The TDR Series Dual Output Time Delay Relay (2x80 A) includes: Dead Batteries prevention due to add on equipment loads left on after engine stops or from multiple systems connected to your battery with independent keep alive power draw, maximizing operational readiness. Supports On Board Video Systems when vehicles are not in use allowing lengthy downloading while shutting down less time sensitive equipment sooner. Protects sensitive on board