this is RCMOY Brand, compatibility Skywalker program12A UBECType: Brushed/Brushle :BLHigh Voltage/Regular:RegularSpecifications Cont./Peak Current:12A/15AInput:2-3S LiPoBEC Output:Switch Mode:5V,1ASIZE:38.0x18.0x6.0mmWEIGHT:9gSpecifications:Constant current: 15APeak current (10s): 20ABEC: 5V 2ALipo: 2-3SNet Weight: 14g20A:Model: Sky-20AContinuous Current: 20ABurst Current (>10s): 25ABEC Mode: LinearBEC Output: 5V2ABEC Output Capability: 5 Servos (2S Lipo) / 4 Servos (3S Lipo)Battery Cell: 2-3S (Lipo) / 5-9 cells (NiMH)Net Weight: 19gDimension (L x W x H): 42 x 25 x 8mmCable length: 25cmPackage size: 12.5 * 11 * 2.5cm40A:Model: Sky-40AContinuous Current: 40ABurst Current (>10s): 55ABEC Mode: LinearBEC Output: 5V2ABEC Output Capability: 5 Servos (2S Lipo) / 4 Servos (3S Lipo)Battery Cell: 2-3S (Lipo) / 5-9 cells (NiMH)Net Weight: 35gDimension (L x W x H): 68 x 25 x 8mmConstant Current: 30APeak Current:40A(10s)Voltage: 2-3S lixxBEC: YesBEC Output: 5V/2AColor: blackProgrammable:YesSize: 70*25*8mm (not including cable length)Net Weight:38g- 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 UBEC Type: Brushed/Brushle :BL High Voltage/Regular:Regular Specifications Cont./Peak Current:60A/80A Input:3-6S LiPo BEC Output:Switch Mode:5V,3A SIZE:77.0x35.0x14.0mm WEIGHT:63g 80A UBEC 80A UBEC Type: Brushed/Brushle :BL High Voltage/Regular:Regular Specifications Cont./Peak Current:80A/100A Input:3-6S LiPo BEC Output:Switch Mode:5V SIZE:86.0x38.0x12.0mm WEIGHT:82g