Item Type: Material: ABS Parameters: Battery Type: 18650 Li-ion Battery x 1 Capacity: 2000mAh (Shipped with Built In Battery) 1Superior Performance: Aquarium air pump with a powerful motor with dual outlets for consistent performance and easy delivery of large and consistent bubbles. 22 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. 3Full Copper Motor: Aquarium bubbles oxygen pump with full copper high frequency voltage regulator transformer, low resistance, reduced consumption and stable oxygen supply. 4Built in Battery: Aquarium oxygen pump has a built in high capacity 2000mAh battery, which switches from electric to battery when the current is interrupted. 5Anti 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.1. Please charge the pump in time after use, the product should not be left without electricity, such as infrequent use, please keep put 3 months to charge 1 time about 8 hours, so as not to affect the life of the battery. 2. The position of the air pump must be higher than the highest water level of the tank to prevent water from flowing into the air pump along the exhaust pipe, the air pump is not in use should be unplugged and stored in a dry place, charging type please keep away from flammable and explosive substances.1 x (Battery Included) 1 x Charging Cable 2 x Air Hose 2 x Air Stone