Don't guess. Get smart about what's in your air. An Alen Air Quality Monitor (AQM) tells you where you need the power of an Alen purifier to help eliminate airborne particles in high density rooms, or pair an AQM with your Alen BreatheSmart FLEX, BreatheSmart FIT50 or BreatheSmart Classic to gain insight into what your Alen is doing 24/7. Just connect your AQM to your Alen app and make the invisible, visible!