The ergonomically designed and lightweight Lighthouse HANDHELD 3016 IAQ is the newest, most advanced handheld particle counter on the market, featuring Mass Concentration Mode that approximates density in μg / m3. Features: 1-0.3 – 10 μm Size Range 2-0.1 CFM (2.83 LPM) Flow Rate 3-View 6 Particle Sizes Simultaneously 4-Approximate Mass Concentration in μg / m3 5-3.5” (8.89 cm) Color Touch Screen Interface 6-Removable / Rechargeable Li-Ion Battery 7-Large Memory for Storing Data (3,000 samples) Concentration Limit – 4,000,000/ft3 8-Temperature/Relative Humidity Probe Included 9-200 User Defined Alphanumeric Location Labels Easily Configurable Interface with Zoom 10-Capability On Screen Data Buffer Viewing 11-Molded Handle Allows One-handed Sampling 12-Internal Audible Alarm Ergonomically Designed Lightweight 13-Data Easily Downloaded to Computer 14-50-record Configurable Recipe Database Made In USA