Feature 1Powerful Function: High strength controller can control the motor and obviously enhance the speed of the motor, effectively increasing the motor power. 2Strong Power: The high power controller can improve efficiency and give your model a strong start and climbing power. 3Stable Performance: ECU programmable controller protects the battery and extends battery life, as well as increasing the driving distance. 4Perfect Match: Sine wave controller has stable effect and is not easy to fluctuate, which can be well matched with QS hub motor or QS medium drive motor. 5Durable Material: Brushless controller is made of reliable ABS and metal, which is resistant to high temperature and can be used stably for a long time.Item Type:ProgrammableBrushlessControllerMaterial: ABS, MetalVoltage: 72VBus Current: 200APhase Current: 400AUndervoltage: 63VWaterproof Level: IP67PC Programmable Support (with debugging software)Default Functions of the Controller:Hall plug, reversing, 0V low brake, throttle (0-5V), 12V high brake,ignition, single wire, Hall meter line, program port, three speed adjust, sport mode, parking,antitheft, charging regeneration, weakmagneticcurrentEM series controller is sine wave type controller, which is weak magnetic brushless DC controller. Generally with QS motor is better, if you want to match thenew motor, some parameters should be tested by yourself. .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x Controller3 xWiring5 x ScrewNote1. Professional installation is highly recommended, our customer service has instructions and debugging software, if necessary, please contact customer service to request.2. Please read the manual carefully before installation, can be used with debugging software for adjustment.