Feature: 1. This product uses a widely used Mini USB interface with strong adaptability 2. Widely used, can be installed in various products, smaller in size, lighter in weight, suitable for motorcycles, robots, etc. 3. Small size, easy to carry and store, convenient to use and with good performance. 4. With low voltage protection, programmable voltage range protection, prevent over‑discharge, and protect the battery. 5. Made of high‑quality materials, strong and durable, has a long service life. Specification: Item Type: Electric Speed Controller Material: PCB board + aviation aluminum alloy heat sink + thermal silica Model: Single drive mini V4.20 FSESC 50A Hardware: V4.20 Firmware: Latest version Current: Continuous 50A, instantaneous current 150A BEC: 5V at 1.5A BEC Type: Internal driver support Time: Software calibration Frequency: PWM input PCB Size: Approx. 39 x 46 x 17.4mm / 1.5 x 1.8 x 0.7in Size: Approx. 67 x 39 x 18.3mm / 2.6 x 1.5 x 0.7in (including radiator) Programming Card: No Reverse: Yes Motor Wire: 12AWG Power Cord: 12AWG The Shipping Package Contains: 1 x Electric Speed Controller 1 x Micro Usb 1 x Vesc Sensor Line 1 x User Manual . Package List: 1 x Electric Speed Controller1 x Micro USB1 x Vesc Sensor Line1 x User Manual