New in the package 4-in-1 ESC from specially designed for quadcopter applications. Features 1. 4 speed controllers in 1board, only 1 pair of battery wire is needed. 2. Powerful switch mode built-in BEC (the BEC voltage outputs from the S3 connector). 3. Multiple protection features: Low voltage cut-off protection / over-heat protection / throttle signal loss protection. 4. The throttle range of each ESC can be calibrated to be suitable for different multi-rotor flying control systems / transmitters. 5. Maximum speed: 210000 RPM (2 poles motor), 70000 RPM (6 poles motor), 35000 RPM (12 poles motor).
eBay