Digital Power Manager w/Jump Start (500 amp) Weather proof;Can withstand underhood temperatures away with the exception of exhaust heat.;Completely automatic charging and automatic battery combining up to 250 amps;Optional indicator light included in kit;6 gauge wire (Two 5 foot lengths of red and One 4 foot length of black);Terminals and heatshrink included Painless Wiring Painless Wiring Digital Power Manager w/Jump Start (500 amp) - 40121 40121 Dual Battery Isolator