LCD display with backlight. Low battery indication. Wind speed unit is switchable: m/s, km/h, ft/min, knots or mph. When measuring in MAX mode, the counter only displays the value greater than the current value; when measuring in AVG mode, it will display the average value. Data hold function and maximum and average value measurement. Power off automatically after five minutes without operation Product This anemometer is portable and useful, which can measure wind speed and temperature, it can also show you wind scale, as well than the wind factor. LCD display with backlight, it is easy to read the value in the night. Specifications: Range of wind speed: 0-30m/s Resolution: 0.1m/s Accuracy: (5%rdg+0.5) Temperature range: -10~50C Resolution: 0.1C Accuracy: 2C Wind scale: 0-12 Operating temperature ly: 0-40C ( 1 * Wind Speed Meter Delivery Quantity: 1 piece Product color: red Product size: 160*55*30mm Note: manual measurement, please allow 1 - 3cm error