How to properly put on the breathing mask?

How to properly put on the breathing mask – video

Using the oxygen mask – mouthpiece

1. Remove the plastic cap from the canister. The plastic cap also serves as an inhalation mask.
2. Place the inhalation mask onto the valve at the top of the canister.
3. Hold the mask together with the canister over your nose and mouth
   (the narrower cut-out on the mask should face the nose).
4. Press the button while taking a deep breath through your nose for 3 seconds.
5. After use, place the mask/cap back onto the top of the canister.