QYSEA FIFISH V6 Quick Start Manual page 8

D. Take off the protect cap, tie the knot around the rear wing
E. Plug the tether (ROV end) into the ROV, the ROV will automatically
turn on. The music will play 5 chimes: (Do, Re, Mi, Do, Mi)
F. Check the remote controller, the "ON/OFF" and "LOCK/UNLOCK"
buttons consistently on indicates the successful hardware connection
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