CE and Rohs certification, Equipped with excellent magnetic detection technology. LCD display with backlight. Low battery indication. Wind speed unit is switchable: m or s, km/h, ft or 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 of no operation Product description This anemometer is portable and useful, which can measure wind speed and temperature, it can also show you wind scale, as well as wind factor. LCD display with backlight, it is easy to read the value at night. Specifications: Range of wind speed: 0-30m or s Resolution: 0.1 m or s Accuracy: (5 percent rdgand0.5) Temperature range: -10 - 50 C Resolution: 0.1 C Accuracy: 2 C Wind scale: 0-12 Operating temperature : 0-40C ( Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.