The Pari Trek bought with rechargeable battery back up is a good one. Not cheap. The other one i have is a hand held by Omron. It is a mesh nebulizer that runs on regular batteries. Mesh is usually not recommended with saline but they say this one works with saline. I have not tried it yet so cannot say. Today we have an electrician coming and our electricity will be off most of the day so i grateful to have the back ups!