ZTW Spider 12A OPTO Simon K Brushless Multirotor ESC Speed Control 1pc for ZTW Spider Simon K 12A Brushless ESC Multirotor Speed Controll ZTW Spider 12A OPTO ESC Brushless for SimonK Multi-Copter speed controll ZTW Spider Simon K Brushless Multirotor ESC Speed Control 12A OPTO Features: 100% Brand new and high quality! Extremely low internal resistance Super smooth and accurate throttle linearity Safety thermal over-load protection Auto throttle shut down in signal lose situation Supports high RPM motors Use new generation of the MOS to make sure the ESC with low heating and more reliability. Specifications: Continuous Current: 12A Burst Current(10s): 20A/10s Battery: 2-4S Max Power: 880W Package includes: 1 x 12A Brushless Speed Control ESC