main features 350w wheel motor provides the max 25km/h speed and max 30 degree gradient. li-ion battery ( included in product ) for max 80km mileage. 14 inch rubber inflatable wheels for different grounds to take. 21kg ultralight weight and quick folding design for convenient carrying in your car trunk. aluminum alloy shell for max 120kg payload. professional bicycle ergonomic design make you feel more comfortable when riding. suitable for adults and teenagers for fun. specification power assist system:3 gear power boost battery capacity:14.5ah folding type:folding max payload:120kg charging time:7 hours input voltage:ac 100-240v package sizes:90cm*39cm*68cm electricity-assisted mileage (reference):150km main materials:aluminum alloy product sizes:126.5cm*59cm*97cm.syi