Kohree Electric Trailer Jack 3700lbs, Heavy Duty RV Electric Power Tongue Jack Max 4000lbs for Travel Trailer A-Frame Camper, with Drop Leg & Weatherproof Jack Cover, 22" Lift, 12V DC Black

Product description Max Lift Capacity 4000LB! Kohree RV Electric jack helps you lift trailer easily.

Just push the RET switch to extend the jack until the footplate touches the ground.

Retract the jack by pushing the EXT Switch.

Or use a crank handle for manual override in case of power loss.

→Twist off the dust cap from the top of the jack.

→Insert the manual crank handle into the access hole and engage the drive screw.

→Rotate the handle counter-clockwise to extend the jack and clockwise to retract it.

CONNECTION INSTRUCTIONS: Negative (-): The Power Tongue JackConnect the black wire to the positive (+) terminal of the battery or junction box.Tips: The Jack needs a large instantaneous current when starting from the lowest point, or it may not start successfully.

It is recommended to use the hand crank to raise the jack by 0.1 inches before use.