Features: 1. with the abnormal overload protection and current protection function 2. Speed can be adjusted by VR port. Speed control mode: one is voltage control: give VR port input 0 to 5v voltage. 3. Has the locked-rotor protection function, if Motors can not start within 5s repeatedly, module will stop output. Adjust voltage VR port to 0v or power off, the protection status can be removed 4. The function of the speed pulse signal output, M port, read the rotational speed of the machine. Depending on the motor each circle of the output pulse number is different. 5. Enable function, EL port, High level (5v) motor work, low level (0v) motor stop. If motor less than 60W,not need heat sink, more than 60W must be add heat sink, without heat sink will reduce the driving efficiency, the temperature is too high will bring permanent damage! Working voltage: DC 36V-72V Working current: ≤15A Drive power: ≤700W Speed regulating voltage: 0V-5V PWM control of motor speed frequency: 1KHz--10KHz Work temperature:-40---85℃ Work humidity: ≤90%RH Set: A NO Hall Version/ B with Hall Version Material: PC+metal colour: green Package Contents: 1 x Drive Board(NO Hall Version) / 1 x Drive Board(with Hall Version) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.