It is recommended to keep firmware 5.2 from factory ship, the new firmware upgrade may damage the ESC.
Specs:
Hardware:V4.20
Firmware: Latest Version
Amps: 50A continuous / 150A peak
Cells: 3-13S LiPo
Voltage: 8V-60V
BEC: 5V@1.5A
BEC type: Internal driver support
Timing: Software calibration
Cutoff Voltage: Programmable
Frequency: PWM input
Governor: No
Weight: 80g
PCB Size: 39x46x17.4mm
Size:67 x39x18.3mm(Include Heatsink)
Programming card: No
Reverse: Yes
Motor wire: 12AWG
Power cable:12AWG
Warm tips: please do not remove the shrink to protect the pcb electronics components from impurites or metals which result in short circuit or esc burnt damage.