Here's a pretty good video
REMOVE PROPS
Disconnect M1 from KK2
Apply main Lipo power
Throttle HIGH on transmitter
Connect M1 to KK2
Hold 1 & 4 buttons on KK2
Wait for ESC beep to acknowledge high throttle
Throttle LOW on transmitter
Wait for ESC beep to acknowledge low throttle
Release buttons, arm and test.
