MPQ902 Car Electromagnetic Battery DC Oxygen Pump Oxygen Flush Pump Air Pump Model: MPQ-902 Voltage: 12V Current: 2.8A Power: 18W Exhaust pressure: 0.060Mpa Discharge volume: 30L/min Outlet diameter: 8mm Distributor specification: 4 Weight: 0.8Kg/pc mail weight about 1.5kg External dimensions: 177x98x127mm Features a, using high quality DC permanent magnet motor, oil-free lubrication design, compressed air is more pure; b, Impact-resistant diaphragm, high-grade rolling bearing, balanced centrifugal spindle, durable; c, suitable for seafood transport trucks, markets, hotels and other places live fish oxygen supply use; This product needs to be used with transformer !!!! This charging pump needs to be used with air tube and air stone! The air tube and air stone need to purchase separately! The air stone needs to use 4 pieces!