1、100% brand new and high quality. 2、LCD display can provide clear readings for you. 3、It is power off automatically in 5 minutes without any operations 4、It has freezing tips and low voltage prompts function. 5、Used in industry, home room air measurement, automotive air conditioning air test, weather, etc. Features: 1. 100% brand new and high quality 2. LCD display can provide clear readings for you. 3. It is power off automatically in 5 minutes without any operations 4. It has freezing tips and low voltage prompts function. 5. Used in industry, home room air measurement, automotive air conditioning air test, weather, etc. Specification: Condition: 100% Brand New Model: YITENSEN816 Size: Approx. 104.3 * 57.8 * 19.9mm / 4.1 * 2.3 * 0.8in Wind speed range Unit Range Resolution Threshold Accuracy M/s 0~30 0.1 0.1 ±5% Ft/min 0~5860 19 39 Knots 0~55 0.2 0.1 Km/hr 0~90 0.3 0.3 Mph 0~65 0.2 0.2 Temperature range Unit Range Resolution Accuracy ℃ -10℃~45℃ 0.2 ±2℃ ℉ 14℉~113℉ 0.36 ±3.6℉ Battery CR2032 3.0V(not included) Thermometer NTC thermometer Operating temperature -10℃~45℃(14℉~113℉) Operating humidity ≤90%RH Store temperature -40℃~60℃(-40℉~140℉) Current consumption About 3mA Package List: 1 * Wind Speed Meter 1 * User Manual 1 * Rope