This kit features an advanced sealed/maintenance free, rechargeable 12 volt battery and Tekonsha designed built-in "trickle" charger unit. The Shur-Set III meets or exceeds D.O.T. specifications regarding breakaway/holding requirements for trailers having up to three axles equipped with electric brakes. Mounts on jackpost of A-frame. Weather/corrosion resistant. Includes KMS# 5720180 battery case with mounting bracket, KMS# 5720230 12 volt sealed, rechargeable 5 amp battery, KMS# 5720100 nylon breakaway switch and KMS# 5720240 battery charger.