Lanlan FVT Little Bee Electric Speed Control, 20a Mini Esc 2-4s It allows the fc to send control commands to the motor quicker, therefore in theory your multirotor should perform better It allows your motors to respond to throttle decreases much quicker, allowing for more stable flying, and higher response to throttle decreases With the blheli software rapidly evolving, you can flash the latest firmware using the 3 pin connector and suitable usb adapter Little bee 20a escs small fast and super lightweight