Compressor cooler system allows for fast and efficient cooling. Battery box with lid protects battery against liquids. LED display indicates internal temperature. USB port enable charging of mobile devices. Carrying handle with casters for easy transportation. Integrated bottle opener for pop-top style bottle caps. Items included: Batteries and charge sold separately. Shoulder strap (A-71093), AC adapter(WL00000138), cigarette lighter adapter (WL00000139).