Ideal for fans/motors/blowers furnace velocities paint spray booths environmental testing. -Features & Benefits : Hot wire sensor at end of thin telescoping probe accurately measures speed and temperature of low-speed airflows in ducts vents and other tight spaces Jumbo LCD Min/Max memory + data hold Five available air speed units Auto power off CE and RoHS approved Specifications : Airflow Velocity Measurement Range: 40 to 3940 ft./min (0.2 to 20 m/sec) Airflow Measurement Accuracy: ?5% Temperature Measurement Range: 32? to 122?F (0? to 50?C) Ambient Temperature Measurement Accuracy: ?1.5?F (?0.8?C) Dimensions of Instrument: 7.1 x 3.1 x 1.5 in. (185 x 78 x 38mm) Weight of Instrument: 12.5 oz. (354g) Power Source: 1 CR2032 battery (included); 4 AA batteries (not included) Includes : Molded hard case and probe CR2032 battery User?s manual- SKU: GTHWA4204HA