UEI instruments offers the ultimate value in high quality test equipment. The rigorous quality control assures that the product that you purchase will be the best possible. Features Mini vane probe with built-in temperature & RH sensor 0.7 inch diameter vane head with long telescopic and scale marked probe Up to 1 hour accumulative average Metric & imperial scales Handheld size easy to carry In-duct or grill surface measurements Low battery indication Fast accurate response Display Maximum and Minimum value Hold function freezes current readings Sleep and non-sleep selectable Powered by 9V batteries or 9V DC adaptor Digital In-Duct Mini Vane AnemometerMeasures: Air velocity RH% TemperatureCalculates: Air volume web bulb Dew pointIncludes: Rubber holder probe: 0.7 inch diameter vane head with 39 inch long telescopic & scale marked probe Hard carrying case 9 V battery Manual - SKU: UEI035