Feature: 1. Quick Response: RC brushless motor 40A ESC features 2 way 1:1 power output, no brake, direct reverse, quick response, and sensitive handling. 2. Plug and Play: No need to calibrate throttle stroke, plug and play. You can install the ESC quickly and put it into use immediately. 3. Wide Application: This bidirectional 40A brushless ESC is applicable to RC cars, boats, remote control boats, underwater thrusters, etc. 4. 5V 3A BEC: Electric speed controller is equipped with 5V 3A BEC, continuous current is 40A, and applicable power input is 2‑6 lipo battery. 5. Reliable: This 40A electric speed controller for RC brushless motor adopts imported electronic components and is tested with full power, durable and reliable. Specification: ​Item Type: 40A Bidirectional Brushless ESC Material: Electronic components Gross Weight: 31g / 1.1oz Color: Black Continuous Current: 40A Applicable Battery: 2-6S lipo BEC Output: 5V 3A Applicable: For RC car, boat, remote control boat, underwater thruster, etc.. Package List: 1 x Bidirectional 40A Brushless ESC