7.2 Holding the Device Correctly Make sure you are standing or sitting upright and feel relaxed. Hold the device with your hand cupped around the lower rear section of the device, with your fingers and thumb on the coloured rubber grips. Make sure that your hand doesn’t cover the air inlet. Now place the device in your mouth so that your lips cover the outer shield to make a seal and the mouthpiece bite blocks are gripped between your upper and lower teeth.
Make sure not to cover the air inlet
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