This is the Gunai electric mountain bike available in black or white. It has a 21-speed professional transmission system and can reach up to 35 km/h with the hidden battery which takes 5 hours to fully charge. It has a thickened and comfortable seat with elastic sponge which can have its height adjusted. It has Chaoyang special cover tyres and three bladed magnesium alloy wheels which is waterproof and wind resistant. It has an aluminium frame, front suspension fork and bright LED headlights. It has a display screen where you can check the battery level, gear position, speed and mileage.