Feature 13 Gears Working Mode: The solar oxygen pump has 3 different working modes for adjustment, that is high gear, medium gear and low gear. The correct working mode can be selected according to different needs. 2Energy Saving: This solar oxygen pump uses solar panels to absorb sunlight, and then converts solar energy into electric energy, which is energy saving. 3High Performance: The oxygen pump is made of premium ABS material, with the characteristics of environmental protection, anti seismic and waterproof, and has long service life. 4Portable: The solar oxygen pump is small in size and light in weight, which is very convenient to carry and use, and especially suitable for outdoor use. 5Applicability: The oxygen pump is widely used in various aquariums, fish tanks, swimming pools and ponds, especially for adding oxygen when the emergency supply is insufficient.Item Type: Solar oxygen pumpMaterial: ABS plasticWeight: Approx. 475g/16.8ozProduct Size: 15x8.5x4.5cm/5.9x3.3x1.8inBattery Type: Lithium battery(Shipped with built in battery)Battery Model: 18650Battery Capacity: 3600mAhSolar Voltage: 5V 1WOxygen Pump Type: DC micro air pumpOxygen Pump Gas Volume: 1L/MINNoise: Less than 60dBMode: There are 3 different working modes for adjustment, high speed gear, medium gear and low gear .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 SolarOxygenPump1 x Tee Head2 x Bubble Stone1 x Hose1 x USB Line1 x Instructions