How is works 1. The body of the stick is filled with pressurized air using a bicycle pump or air compressor. 2. When the rider jumps down on the pedals, his weight forces the shaft and piston into the cylinder, compressing about 24 of air into an 8 space... 3. When the pressure inside the cylinder exceeds the pressure exerted by the rider, the pogo stick reverses direction. Why Choose Our Air Pogo Stick: 1. It is more light than old generation spring pogo stick 2. It can be jump more higher that old generation 3. It is batter look than the old generation. Pogo Stick Specification: Model No.: ID-9001 N. W: 4.2KG G. W: 6.0KG Meas: 100X35.5X10.5 CM (Color Box) Load Range: 30KG-110KG Color: Crystal Load Quantity/Container: 800PCS / 20Ft Container 1600PCS / 40Ft Container 1800PCS/ 40Hq Container It comes with 1 PCS Air Pogo Stick, 1 PCS Air Compressor (Auto Use Only), 1 PCS DVD, 1 PCS User Manual ( English )