1.36v350w tsdz2 mid drive motor with torque sensor. 2.no brake lever 3.speed sensor with magnets 4:no thumb throttle 5.e-bus cable set(can compatible till 28inch bike) 6.easy installtion as 8fun center motor 7.42t chainwheel tsdz2 motor tends to produce less noise compared to some hub motor systems. the quiet operation enhances the overall riding experience and reduces noise pollution while cycling. tsdz2 motor uses a torque sensor to detect the rider's pedal force and adjust the motor assistance accordingly. this torque-sensing technology provides a more natural and responsive riding experience, where the motor's power output is directly proportional to the rider's pedaling effort..syi