it works just like any other backpack, i have kept a few details secret
it can have a 40 psi pump or 100 psi any colour, i wont convince everyone, but over time everyone will see that i am right, just a little history of the backpack idea for those who might not know, the back for w/c was born, becouse jeff brimble and lewis doubtfire (bladerunner) they worked so hard to achieve this, then suddenly many months later the shurflo appeared, yes their ideas where scritinized and developed, and i still have the pictures today of there backpacks prototypes, so thanks to these 2 budding inventors the electric backpack was born, they inspired me a lot, thanks guys