Description: 【Long oxygenation time】: The fish pump with compact design can be used intermittently for up to 70 hours, and it uses USB, which is more convenient to use. 【Dual Mode】: Two working modes, namely continuous oxygen supply and intermittent oxygen supply, 1 button switching is very fast. 【Silent Operation】: The noise from the silent pump is less than 30 decibels, suitable for feeding fish in a quiet environment, such as living room, bedroom, etc. 【Easy to Use】: The air aquarium air pump comes with a water hose and , no other accessories are required. There is a fixed clip at the bottom, which can be clipped to the waist or fish tank. 【Wide Application】: Multiple shock absorbing silicone pads can greatly reduce noise, suitable for outdoor fishing, small and medium aquariums, fish tanks, ponds, etc. Specification: Material: PP Size Chart: Single Hole: 12cmx6.7cmx5cm/4.72inchx2.64inchx1.97inch Double Hole: 12cmx8.5cmx5cm/4.72inchx3.35inchx1.97inch Package Includes: Single Hole: 1 Aquarium Air Pump 2 tubes 2 Air Stones 1 USB Cable Double Hole: 1 Aquarium Air Pump 1 Tube 1 1 USB Cable Note: Please allow slightly errors due to manual measurement and different monitors.