Wind speed display: four-digit display, maximum 9999Sensor: infrared laser-cutting of tubeSampling rate: 2 times/secondAutomatic shutdown: 10 minutes (can be manually turned off)Operating environment: -10~50C, maximum relative humidity of 80%, indoor altitude Less than 2000mparameter:Model: TA641AMeasuring range: 0.06~30.0m/sAccuracy: 0.2+ (2% of reading)Resolution: 0.01/0.1/1Wind temperature:Measuring range: 0~45CAccuracy 2Chumidity:Measuring range: 0 ~ 99%RHAccuracy: 8%RHStorage environment: -10~50C, maximum 70% relative humidity (with battery removed)Product size: 152 x 55 x 33mmDisplay size: 37x41 mmWeight: about 135g (without battery) supply: 3X1.5VAAA (R03/LR03)Colour:black+redMaterial:ABSPackage Contents:1 x Wind Speed Gauge1 x English manualOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.