Carry anywhere for a wide range of environmental measurements Light weight, tiny size with simple, one-hand, operation. Reads air speed in addition to the wide selection of environmental parameters listed below. Will sense airflow as low as 0.4 m/s with an accuracy of ±3% (4% >20m/s). Anemometer vane snaps in and out for easy replacement if damaged. All models feature min/max, hold, a backlight and come complete with a wrist strap, carry pouch, and button cell battery. An optional Pt 1000 probe enables penetration temperature measurements of liquid or solids.Dim: 4¾" x 1¾" x 1¼" (120 x 45 x 20mm)Weight: 5.6oz (160g)