12A: Rotation direction of the motor is programmable: normal, reverse or bidirectional All parameters can be programmed via using a program card or a transmitter, including default settings Multiple protection features including low voltage cut-off protection/over-heat protection/throttle signal loss protection Alarm to help you find the devices: keep the throttle on FULL ON position for a while, the ESC will help Throttle range can be configured and is fully compatible with all receivers, providing smooth, linear and precise throttle response Specifications: Continuous current: 12A Burst current: 15A 10S Battery: 2-4S BEC output: 1A 5V Size: 45 x 18mm(Excluded cable) Material: Plastic & Electronics Color: Black 20A: Rotation direction of the motor is programmable: normal, reverse or bidirectional All parameters can be programmed via using a program card or a transmitter, including default settings Multiple protection features including low voltage cut-off protection/over-heat protection/throttlesignal loss protection Alarm to help you find the devices: keep the throttle on FULL ON position for a while, the ESC will help Throttle range can be configured and is fully compatible with all receivers, providing smooth, linear and precise throttle response for 250 FPV Quadcopter Programmable Specifications: Color: black Continuous current: 20A Burst current: 25A@10S Lixx battery: 2-4S Output: 2A 5V Dimension: 58*26*7mm Net weight: 26g Package weight: 37g 30A: Item:EMAX Blheli 30A Continuous Current:30A Burst current(10S):40A Li-xx battery(cell):2-4 Dimension L*W*H(mm):52x26x7 BEC Mode: Linear BEC Output:2A/5A Programmable:yes