Simply swipe a finger through the air sideways and you can toggle from screen to screen, or up and down to scroll through something you're reading.

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If you ever toggle the screen off, you'd need to touch the panel to unlock it again and restart recording -- an action that's impossible with the waterproof case.

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Google's version requires one more tap to toggle the secondary panel for the common settings, including screen brightness, WiFi, auto screen rotation toggle and airplane mode.

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