FlexTail ZERO PUMP | World's Smallest PumpSimply attach ZERO PUMP to your sleeping pad, then double click it, and it will work for you. No need to hold it in your hands. Hand free is a perk! Specifications: Weight 1. 2 oz Size 1. 02* 2. 95 inches Running Time 25 min Maximum Pressure 2. 5 kPa Air Flow 180 L MIN Battery Capacity 650 mAh Features: Good rest and a light pack are both essential in backpack journeys. Hence, we made ZERO PUMP the lightest and smallest outdoor pump that shaves weight