12AE: Continuous current 12AE, short-time current 15A (less than 10 seconds) Power input: two lithium batteries or 5-6 NiMH / NiCd battery pack BEC Output: 5V @ 2A (linear regulator mode -linear mode) Throttle signal frequency range (Refresh rate): 50Hz-432Hz Maximum speed: 2-pole motor 210000 rev / min, 6-pole motor 70,000 rev / min, 12 pole motor 35,000 rev / min Size: 38mm (length) * 18mm (width) * 6mm (H) Weight: 9g 20A: Model: Skywalker-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 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: Model: Skywalker-40A Continuous Current: 40A Burst Current (10s): 55A BEC Mode: Linear BEC Output: 5V3A BEC Output Capability: 5 Servos (2S Lipo) / 4 Servos (3S Lipo) Battery Cell: 2-4S (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: 60A@10S 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: Item Name: SkyWalker 60A UBEC ESC 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: Item Name: SkyWalker 80A UBEC Type: Brushless ESC,Regular voltage Cont./Peak 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 Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.