TY-703Motor:350w or 500w brush motor, no noise Brake:front hand brake, rear foot brake Battery:48v, 17ah, lead-acid Recharge times:300 times Charging period:2-6 hours Input:110-220v Max Speed:35-40km/h Range per charge:>50km Max Load:75kg *High-efficient rare earth brush DC motor. (the motor is in the middle of wheels. it is same to electric bicycle motor, no noise)*Digital controller with indication and protection of overload and low voltage.