Features Split design, easy to carry Four kinds of wind speed units (m / s, Knots, km / h, Mph) switch Wind speed / air temperature measured simultaneously real-time display Maximum / minimum / average measurement function Automatic shutdown feature set Technical Specifications Wind speed measurement range 0.3 ~ 30m / s Wind speed measurement error of 3% 5 dgts Wind speed unit selection m / s, Ft / min, Knots, km / h, Mph There the average measurement Max / min measurements have Air temperature measurement -10 ~ 45 Temperature error 2 C / F Conversion A There backlit display Suggesting low Analog showed Resolution of 0.1m / s, 0.1 Power supply 2 AAA (1.5V) batteries (not include) not have Package weight 225g Packing size 255 * 212 * 58mm Packing: ABS plastic packaging