Increased comfort of thick 3CM cushions by 80%, while durability is significantly improved Backrest shrinkage design, can adjust the depth of the backrest according to the user's body shape With the parking brake, pull the brake lever to the next one, and hear the slamming sound that the whole car is locked. The front fork with reflective marking, especially at night, the car lights will reflect light and be safer. The armrest can be raised with five-star bayonet screws for safety