Today the missing piece of the pump arrived and I had instructions on how to use it. The tube goes in front of Cs teeth and I can direct it into his cheek where saliva and yucky stuff gathers. It works really well especially when he coughs and can't get rid of what is produced. Thumbs went up when I asked him if he wants me to use it and again when I asked him if it helps. As well as a charger for home, there is also one for in the car. It is very noisy though. It's only day one but so far it has been a success.