With 4.5kPa(300L/MIN) high and 2.5kPa(192L/MIN) low pressure mode, FLEXTAIL MAX PUMP 2 PLUS electric air pump can well balance the speed of inflation and battery life. Size: 2.2 x 1. 9 x 3.5 inches Weight: 190g(6.7oz) Battery Capacity: 17.76Wh Waterproof Level: IPX4 Inflation Pressure: 4.5 / 2.5 kPa Deflation Pressure: -4.5 / -2.5 kPa Flow: 300-195 L/min Running Tim: MAX 90 min Brightness: 50-500 Lumen Running Time: 20-72 hrs