On the binatone walkie talkies (black and orange) how do you get the lock off? Thanks

It's difficult to answer without knowing which model, I know the Marina 300 came in black and orange however a few others have also had that colour variant. To remove the keylock from the Marina 300 you PRESS AND HOLD THE MENU BUTTON UNTIL THE KEY ICON DISAPPEARS. Note: The PTT, Call and Power will remain functional when keylock is on.