To achieve the best working effect, please use original accessories. 2. The air pump is not waterproof and should be kept away from water. 3. Regularly check whether the air duct is blocked, bent, or leaking. 4. Do not lower the air pump too low, you can place it on the fuel tank. 5. The air pump can be connected to USB power bank (mobile power), computer USB port, car USB port, mobile phone and other charging USB ports, and can be used. Packaging included: 1x Aquarium Air Pump 1x air duct 1x Air Stone 2 hooks