20A: Model: Skywalker-20A Continuous Current: 20A Explosive Current (gt; 10s): 25A BEC Mode: Linear BEC Output: 5 v2a BEC Output Capacity: 5 Servos (2S Lipo) / 4 Servos (3S Lipo) Battery: 2-3S (Lipo) / 5-9 Comoacute; rek(NiMH) Net Weight: 19g Dimension(L x W x H): 42x25x8mm Cable Length: 25cm Package Size: 12.5*11*2.5cm 30A: Constant Current: 30A Peak Current: 40A(10s) 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 V2: Model: Skywalker-40A V2 UBEC Continuous Current: 40A Explosive Current (gt; 10s): 55A BEC Mode: Linear BEC Output: 5 v5a BEC Output Capacity: 5 Servos (3S Lipo) / 4 Servos (3S Lipo) Battery: 3-4S (Lipo) Net Weight: 35g Dimension (L x W x H): 68x25x8mm Reverse Thrust: Yes 50A V2: Continuous Output: 50A V2 UBEC Explosive Current: 60A 10S Input Power: 3-4S Lixx/11-12S Nixx Output 5V/5A BEC, switching mode Refresh rate: 50Hz-432Hz Max. Rotational speed: 2-pole 210000 rpm/min; 6-pole 70000 rpm/min; 12 Pole 35000 RPM/Min Dimension: 68*25*12mm Weight: 43g Reverse Thrust: Yes 60A: Item Name: Hobbywing SkyWalker 60A UBEC ESC Constant Current: 60A Explosive Current (gt; 10s): 80A BEC Mode: Switch Mode BEC Output: 5V in 3A Battery: 3-6 komoacute; Lipo or 11-18 komoacute; rek NiHH Refresh Rate: 50Hz-432Hz Dimension: 77x35x14mm Weight: 63g Max Speed: 210000rpm (2 Pole Motor), 70000 rpm (6 Pole Motor), 35000 rpm (Motor