Material Rubber, Acrylonitrile butadiene styrene Item weight 459 Grams Item dimensions L x W x H 13 x 8 x 5 centimeters About this item Made of high quality ABS material, tough and durable. Powered by solar energy, no battery or electricity needed, energy saving and environmental friendly. 100 degree foldable solar panel, easy to adjust a better angle to absorb solar energy. Built-in 2200mAh high capacity battery, it can long time working up to 20 hours once fully charged, while this air pump can be charged by DC power supply with USB cable. The internal circuit adopts intelligent micro-control Imported single-chip computer, supports constant pressure and constant current charging, overcharge discharge protection and low electric alarm, safe to use .