The left throttle is the electric brake, which controls the front wheel. The one on the right side is a disc brake, which controls the rear wheel. MICROGO double braking system quickly identifies braking signals, helps you stably and completely stop the scooter. The upgraded safety and bright headlight, blue led sidelights, and rear brake light for additional efficiency on night riding. Makes the M5 scooter for your choice for your daily commute. M5 Scooter can boost the speed to a maximum speed of 19Mph, a maximum range of 18.5Miles, and a maximum load of 220lbs. Product dimension: 42.7(L) x 16.5(W) x 8.1(H) inches