Sealife SportDiver Ultra SL405 Instruction Manual page 26

Underwater housing for smartphones
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9. Press the rubber tip of the hand pump against the open vacuum check port and pump until the on-screen
gauge needle reaches "GOOD". It takes about 2 to 3 full pumps. Screw-on the vacuum check port cap!
Hand pump pressed against vacuum check port
Note
If you pumped too much, use your fingertip to
move the yellow rubber one-way valve sideways
and release some air pressure. Then, pump again
until pressure is "GOOD".
If the gauge needle does not move when pumping,
inspect the main seal and the vacuum check port
O-ring and try again.
Pump until gauge needle reaches "GOOD"
24

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