These little things are great. This is the third one I got
Using it as I write this. These little things are great. This is the third one I got. They last about a year if you smoke regularly. Had to move back with the folks so this thing comes in handy since I can't simply just can't always go outside with my habits. Works as advertised. Blow smoke in, clean air out.  Works like magic but yea science bitch!
Rating: 5 stars