1Adopt excellent single-chip microcomputer as the controller main control chip to control and protect the motor and battery of the electric vehicle, and improve the reliability and service life of the product. 2With protection functions such as under-voltage protection, over-current protection, stall protection, etc., ensuring the use and safety of electric bike. 3Intelligent control, reliable protection of electric bicycle motor and battery. 4The thumb throttle grip has lock and electric quantity display function, convenient and practical. 5Wonderful accessory for electric bicycle.Condition: 100% Item Type: Electric Bicycle AccessoryMaterial: aluminium alloyColor: As picture shownWeight: Approx. 626g Brushed controller specification: Model: YK31C Rated power: 500W Voltage: 48V Size: Approx. 8.5 x6.5cm/3.3x2.6in 1 x Controller1 Pair xThumb Throttle Grip2 x Key