Feature: 1. Safety protection, no matter where the throttle is, the motor will not rotate when connected to the battery. 2. Throttle calibration function, the throttle range can be calibrated to be compatible with different transmitters. 3. Support a variety of program methods, emitting rod, LED program card. ESC is very easy to operate from home or on the fly. 4. Compatible with lithium and nickel metal hydride batteries. 5. Full protection, low pressure cut off protection/overheat protection/throttle signal loss protection. Specification: Item Type: Brushless ESC Material: Electronic Components Color: As Pictures Shown Weight: Approx. 34g/1.2oz Continuous Current: 40A Maximum Current: 55A Plug: XT60 BEC: Yes BEC Output: 3A/5V Applicable Battery: 2-4S Maximum Speed: 210,000 rpm for 2-pole Motor, 7000 rpm for 6-pole Motor, and 35,000 rpm for 12-pole Motor Application: RC Remote-controlled UAV, Helicopter, FPV, Etc Package List: 1 x ESC