The FVT LittleBee 20A brushless motor driver (ESC) is a high-performance product specially developed for your 250 and smaller drones. Thanks to the SiLabs microcontroller it uses, it offers the highest performance in the most durable way, while it has very small dimensions and low weight. It comes with BLHeli software (firmware) installed on the ESC. In this way, you can make many detailed settings of your drive using the BLHeliSuite software. Technical Specifications: Input voltage: 2-4S Lipo battery ; BEC (5V regulator output): No ; 20A continuous, 30A instantaneous (10sec) current support; Dimensions: 23x12.5x3 (mm) ; Weight (including cables): 7gr ;