X-1 (H2O Audio) Oceanic DV Series - Manual (Page 12)

STEP 12: Turn on the Amplifier using the external button. The LED will turn on.
STEP 11: Insert and connect the MP3 Player
STEP 7: Insert a NEW & DRY 9-Volt Alkaline battery.
CAUTION: Visually inspect the inside to make sure it is dry.
STEP 5: PUSH UP
STEP 6: SLIDE OUT
TO OPEN
STEP 8: SLIDE IN
STEP 9: PUSH DOWN
STEP 10: SNAP CLOSE
TO CLOSE
WARNING: THE MP3 PLAYER VOLUME MUST BE
SET TO ZERO BEFORE TURNING ON THE
AMPLIFIER.