The Edragonfly Turns Your Wheelchair Into A Power-assisted Handcycle. Its A Power-bicycle For Your Hands! the Edragonfly Attaches To Most Wheelchairs. after The Installation Process Is Completed Once, The Device Latches On And Off Your Wheelchair In Seconds. index Shifter Mounted On The Handle To Easily Shift Gears. 250w, 5 Power-assisted Speeds Give You Control For The Amount Of Assist You Need. removable Lightweight Lithium Ion Battery Gives You >20 Miles Range. frame Removes Easily Without Tools For Transportation In Car, Plane, Or For Storage. take Your Wheelchair Out And Enjoy The Freedom To Go Further Than Your Normal Handcycle. The Edragonfly Power Assist Helps Takes You To Places Youve Never Thought Possible. specifications power battery: Lithium Ion, Samsung, 36v, 6.6ah, 238 Wh battery Range: >20 Miles/32 Km charger: 36v, 2a Output voltage: 100~240v charging Time: ~4 Hours If Battery Is Fully Discharged motor: 250w, 36v Geared Brushless Hub Motor brakes 140mm Disc Brake With Locking Lever promax V-brake frame & Components frame Aluminum 6061-t6 light Led drive Train 7 Speed Derailleur 11-28t Cassette 33t Chain Ring index Shifter tire 12.5? X 1.5? (40-203) weight attachment Frame Weight: 6 Lbs / 2.6 Kg drive Unit Weight: 21 Lbs / 9.5 Kg battery Weight: 4 Lbs / 2.0 Kg total Weight With Battery: 31 Lbs /14 Kg maximum Weight: 280 Lbs / 127 Kg (combined)