Description: 1. For drone, quadcopter, multirotor helicopter, etc. 2. Use top quality components to get strong current endurance. 3. Regardless the throttle stick position, the motor will not spin after battery connected. 4. Full protecting features: low voltage cut off protecting / over-heat protecting / throttle signal lost protecting. 5. Throttle range can be configured to provide best throttle linearity, fully compatible with all market available transmitters. Specification: 20A: Continuous current: 20A Burst current 10s: 25A BEC mode: linear BEC output: 5V2A BEC output capability: 5 servos 2S lipo / 4 servos 3S lipo Battery cell: 2-3S Lipo / 5-9 cells NiMH Net weight: 19g Dimension L x W x H: 42 x 25 x 8mm Cable length: 25cm Package size: 12.5 * 11 * 2.5cm 30A: Constant current: 30A Hightest current:40A10s Voltage: 2-3S lixx BEC: yes BEC output: 5V/2A Color: black Programmable:yes Size: 70*25*8mm not including cable length Net weight:38g 40A: Continuous current: 40A Burst current 10s: 55A BEC mode: linear BEC output: 5V2A BEC output capability: 5 servos 2S lipo / 4 servos 3S lipo Battery cell: 2-3S lipo / 5-9 cells NiMH Net weight: 35g Dimension L x W x H: 68 x 25 x 8mm 50A: Continuous output: 50A Burst current: 60A10S Power input: 2-4S Lixx/5-12S Nixx 5V/3A BEC output, switch mode Refresh rate: 50Hz-432Hz Max.rotation speed: 2-Pole 210000rpm/min; 6-Pole 70000rpm/min; 12-Pole 35000rpm/min Dimension: 68*25*12mm Weight: 43g 60A: Constant current: 60A Burst current 10s: 80A BEC mode: switch mode BEC output: 5V at 3A Battery cell: 2-6 cells lipo, or 5-18 cells NiHH Refresh rate: 50Hz-432Hz Dimension: 77 x 35 x 14 mm Weight: 63g Maximum speed: 210000 RPM 2 poles motor, 70000 RPM 6 poles motor, 35000 RPM 12 poles motor 80A: Type: brushless ESC, regular voltage Cont./Hightest current: 80A/100A Input: 2-6S lipo, 5-18s Ni-MH BEC output: switch mode--5V,5A Input wires: red-12AWG-150mm*1, black-12AWG-150mm*1 Output wires: black-14AWG-100mm*3 Input connectors: no Output connectors: no ESC programing via: transmitter, LED program card, program port program/throttle wire Firmware upgrade: not supported Size: 86.0x38.0x12.0mm Weight: 82g Package List: 1 x Speed Controller