1) Brand: Mystery 30A Brushless Motor Speed Controller Programable ESC 2) Output: Continuous 30A, Burst 40A up to 10 Secs 3) Input Voltage: 2-4 cells lithium battery or 5-12 cells NiCd/NIMh battery 4) BEC: 2A / 5V (Linear mode) 5) Max Speed: 210,000rpm for 2 Poles BrushLess Motor, 70,000rpm for 6 poles BrushLess Motor, 35,000rpm for 12 poles BrushLess Motor 6) Size: 45mm (L) * 24mm (W) * 11mm (H). 7) Weight: 25g. Features: 1) 4 sets good for quad-rotor KK multi-copter 2) Safety Arming Feature: Regardless the throttle stick position, the motor will not spin after battery connected. 3) Throttle Calibration: Throttle range can be configured to provide best throttle linearity, fully compatible with all market available transmitters. 4) Program same with Hobbywing 30A