1.Made of solid and weather steel and powder coated black for great durability.This winch solenoid contactor replacement come with shatterproof sealed and case;2.It is designed to handle intermittent current loads of 250 amps for up to 10 seconds, requiring a 20-30 second cooling time between cycles,Wireless remote control kit 12V for winches up to 2000-5000lb.Easy to install and use, portable. 3.Built-in antenna design,Remote range up to about 164ft(50m).Visual indicator light shows remote operation.Allows operator to keep clear of dangerous rigging.Operator can monitor winching or lifting from different positions. 4.Weather- receiver WATERPROOF design,Waterproof casing protect the receiver from rain or coffee spill,Submerged in water operation is NOT recommended;5.12V 500A Winch Solenoid Relay Contactor for all 12Vsolenoid winches,including ATV's,UTV's,SUV's,'s, vehicles, and 12V Trailer . For the Following Winches:For KFI: ST17, S2000, A2500, A3000, U4500, U4500w, SE25, SE35,