Adopting CPU AT32F403ARCT7 with the structure of ARM - allows CPU clock speed.240MHz and the max PWM switching frequency 45KHz, which improves the motor RPM. Programmable via ESC Tool to be compatible with multi-types of motor, different battery,voltages and many control ways.Programmable via VX4 remote(Firmware Version:VX4_V1.2) Supporting FOC with low working noise and smooth starting.Supporting Real-time data and fault alerts.Supporting adaptive variable PWM frequency control. Supporting sensor mode(HALL) and sensorless mode(IPDS, HFPI). Supporting control types: Current, Duty Cycle Protection functions: low and high voltage protection, over-current protection, temperature.abnormally protection, mosfets over-temperature and over current protection, battery over.discharge protecting, motor over-temperature protection. Specs: Firmware: V1.0, supporting update via ESC Tool Voltage: 14-84V(safe for 4-20S) Continuous current: 50V/60A; 75V/50A; 84V/40A (Values depend on the mounting, ambient temperature and air/water circulation around the device!); Current: 250A Communication Ports: USB, CAN, UART Input Signal Support: PPM, UART(compatible with remote VX4 only), ADC BEC: 5V@1A Multiple Speed Gear levels: Low, Medium, High, Reverse Motor/power wire size: 12 AWG Programmable: Yes Regenerative Capacity: Yes Size: L110.5 x W55 x H30mm(Including Alu. Case) Material: ABS+metal colour: black Package Contents: 4 x ESC motor speed regulator 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.