Data holding and maximum and minimum value recording, Low battery indication. It can upload real time data to computers through USB cable. Supplied with a specially designed storage bag for you to carry and protect the instrument. Ideal instrument for windsurfing, sailing, fishing, kite flying and mountaineering, etc. Can also be used for industrial and home purpose such as measuring wind speed and temperature of CPU computer fans, air conditioners, air blowers, etc. It can be turned off by pressing the Power key. And it can also turn off its power automatically. You can long press the FUN button to open or close its function of automatic power off.