ULTRA LIGHTWEIGHT! It is just 31kgs with a Lithium battery! The wheelchair is assembled with Aluminum Alloy Foldable chair, Lithium battery, antiseptic, breathable seat and back cushions. Apply to different road,such as:grass land,ramp road,deceleration strip road,muddy road,snow road,bumpy road,floor tile,brick road. The wheelchair can be also used manually, which makes it easy for use with carers. The powerchair switches between power mode and manual mode with the use of a simple clutch system which is explained in the user manual.