12A:
Continuous current 12A, short-time current 15A (less than 10 seconds)
Power input: two lithium batteries or 5-6 NiMH / NiCd battery pack
BEC Output: 5V @ 1A (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

15A:
Specifications:
Constant current: 15A
Peak current (10s): 20A
BEC: 5V 2A
Lipo: 2-3S
Net Weight: 14g

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: 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 V2:
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: Hobbywing 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