Feature: Use original genuine components to ensure the high quality of ESC, especially excellent flow resistance. Using the new BLHeli-S firmware, throttle linear great performed. Optimized for multi-axis, and well supported fixed-wing and helicopter. With over temperature protection.Support PWM Ones hot42 Oneshot125 Multishot DShot150/300/600, Support BL program tuning. High-speed drive IC, smooth start and quick response. Support high KV motor to start quickly, violent flight. Exposed PCB solder joints. Solder directly to the motor wire. The volume is mini and the weight is light, It makes the installation more convenient and the flight is more sensitive. Description: Con. Current: 20A/30A/35A/45A (Optional) Input Voltage: 2-4S BEC: NO Firmware: BLheli-S Size ( PCB): 13x25x5.4mm Package Included: 1* Brushless BLHeli-S ESC OR 4* Brushless BLHeli-S ESC Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Dadangjia