The Battery Box with all the accessories.easy to handle,easy to carry. The battery accessory special used with battery for RV caravan car or different place ,and the feature with :1 Polypropylene co-polymer impervious to acid,gasoline,oil and solvents2 Optional external Power Take-Off kit available3 Suitable for digital products and camping products4 12VDC supply 5 Energy level display light 6 ...