For BLHeli-S 30A Brushless ESC Bidirectional Fixed Wing/UAV Model Accessories Features: 1.Adopting brand components to ensure reliable working 2.For BLHeli program throttle linearity is excellent. 3. Optimized for multi-axis, and well support fixed wing and helicopter. 4. Programming items have direction selection, support special bidirectional mode. 5. Several parameters of the governor can be set through (usb programmer) or remote control, and the default parameters can be restored through remote control or programming card. 6. With low voltage protection, over-temperature protection, signal loss multiple protection functions. 7. With warning function, the throttle maintains the minimum throttle for a certain time, the ESC will beep in order to retrieve the lost flight equipment. 8. Throttle stroke can be set to be compatible with different remote controllers, with linear speed control feel. 9.Specification: 4s30a Package Included: 1* Brushless ESC Note: 1. Please allow 1-3 mm error due to manual measurement. Please make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you!