Dual Outlet Aquarium Air Pump AC/DC Quiet Oxygen Pump Adjustable Fish Tank AeratorParameter: 4L 1. Air Flow:4L/Min 2. Power:3W 3. Battery:5200mAh 4. Noise:＜30dB 5. Pressure:0.018Mpa 6. Depth:1.2m 7. Voltage:100-240V-50/60Hz 8. Power line length:1.5m 8L 1. Air Flow:8L/Min 2. Power:6W 3. Battery:5200mAh 4. Noise:＜30dB 5. Pressure:0.018Mpa 6. Depth:1.5m 7. Voltage:100-240V-50/60Hz 8. Power line length:1.5m Installation steps: 1. The installation position of the oxygen booster pump needs to be 20cm higher than the water level of the fish tank to prevent the air pump from entering the water. 2. Fix the installation position of the oxygen booster pump, measure the placement path of the trachea, and determine the placement position of the air stone 3. According to the measured length, cut the trachea and connect the air stone Package included: 1 x Dual Outlet Aquarium Air Pump 1 x 6 meters hose 2 x Check valve 2 x Air stone