Description: TEMPerHUM PC Sensor PC USB Hygrometer and Thermometer TEMPerHUM thermometer & hygrometer is a measurement device using USB port to connect to a computer or other machines. It can measure the temperature and the humidity of the machine and the environment accurately and can calculate the dewpoint automatable. It must be connect to the computer to start working .Hid TEMPerHUM can be use in computer room, weather, environment and special environment temperature and humidity testing. Support Email and the remote viewing of MSN and Skype Support data recording, dynamic curves analysing and alarming Compatible with Windows XP, Windows 7 It can transmit the temperature to excel and other textfiles with NumLock/CapsLock. This function supports DOS, Windows, Linux, Mac Specifications: TEMPerHUM PC Sensor PC USB Hygrometer and Thermometer emperature Range: -40℃ ~ +85℃ Resolution rate of temperature: 0.06℃ Precision of temperature: + 2℃ Range of humidity: 0~100RH% Resolution rate of humidity: 0.03RH% Precision of humidity: +5 RH% (20RH%~90 RH%) Signal indication: red light when working Recharging method: PC or AC transfer USB port adapter Weight: 21g Color: Silver Material: Metal Size: 4.9 x 1.6 x 1cm/1.9 x 0.6 x 0.4in(L x W x T)