ZTW Power Capacitor Buffer BEC Backup 60F 6V/8.4V 25A For RC HelicopterDescription: We(ZTW) have released Power Capacitor Buffer BEC Backup 65F 6V 8. 4V 25A For RC Helicopter. Key Features: 1. The capacitor will automatically supply power to the receiver when the receiver was cut off power for some reasons, so that you still can control the servo and let the aircraft land safely. 2. Two ways to control, one ways is by switch, the other way is by throttle signal. The 3 PIN orange signal wire is equal to the switch