Feature 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, <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. 4Builtin 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 shockabsorbing foot pad design, sensitive touch operation, intelligent onekey intermittent, simple operation, safe and reliable.Item Type: AC DC Oxygen PumpProduct Size: Approx. 11 x 7 x 3.3 cm / 4.3 x 2.8 x 1.3 inInput: US plug 110-240V (wide voltage)Output: DC5VBattery Type: 18650 lithium battery (Battery Included)Battery Model: Rechargeable lithium batteryBattery Capacity: 2600mAhMaterial: PlasticApplication: Suitable for fish tank, aquarium, outdoor fishing, aquatic product transportation and oxygenationWeight: Approx. 332g / 11.7oz .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x Oxygen Pump(Battery Included)2 xAir Tube1 x USB Cable1 x Plug2 x Air Stone