Heavy-duty wireless control box system. For 12v winches up to 6.8hp/20,000lb. Everything you need to upgrade or replace your existing winch control box. This control box is for a 12v electrical system only. (Most 3.5T recovery trucks and 4x4's are 12v). Please note that the kit does not include an earth cable and your winch motor must be earthed with a good quality minimum 25mm2 cable directly back to the battery negative to ensure correct operation.