1,Superior Performance: Aquarium air pump with a powerful motor with dual outlets for consistent performance and easy delivery of large and consistent bubbles. 2,2 Water Outlets: Fish tank air pump designed with 2 water outlets for connecting 2 air stones in one tank and also for supplying oxygen to two fish tanks. 3,Full Copper Motor: Aquarium bubbles oxygen pump with full copper high frequency voltage regulator transformer, low resistance, reduced consumption and stable oxygen supply. 4,Built in Battery: Aquarium oxygen pump has a built in high capacity 2000mAh battery, which switches from electric to battery when the current is interrupted. 5,Anti Slip: Fish tank oxygen pump has 4 non slip rubber feet on the bottom to reduce noise and prevent sliding. Can be used indoors and outdoors. Item Type: Aquarium Air Pump Material: ABS Parameters: Battery Type: 18650 Li-ion Battery x 1 Capacity: 2000mAh (Shipped with Built In Battery) 1 x Aquarium Air Pump (Battery Included) 1 x Charging Cable 2 x Air Hose 2 x Air Stone Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin