Item Type: AC DC Oxygen Pump Product Size: Approx. 11 x 7 x 3.3 cm or 4.3 x 2.8 x 1.3 in Input: US plug 110-240V (wide voltage) Output: DC5V Battery Type: 18650 lithium battery (Battery Included) Battery Model: Rechargeable lithium battery Battery Capacity: 2600mAh Material: Plastic Application: Suitable for fish tank, aquarium, outdoor fishing, aquatic product transportation and oxygenation Weight: Approx. 332g or 11.7oz 1This AC DC oxygen air pump is carefully researching and designing,with unique beautiful shape, ultra-quiet, and can be charged to store electricity. 2This produc is in small size, light weight, easy to carry. Work is not disturbed, andlt 40dB silent, will not noisy the rest of you and your family. 3With even and fine air venting, power saving, large output, longer working time, suitable for a variety of outdoor, transportation and other scenes. 4Built in 2600mAh 18650 rechargeable lithium battery, support USB charging. The USB interface can charge the battery directly on the compute or external power supply. 5With bottom shock absorbing foot pad design, sensitive touch operation, intelligent one key intermittent, simple operation, safe and reliable. 1 x Oxygen Pump(Battery Included) 2 xAir Tube 1 x USB Cable 1 x Plug 2 x Air Stone