... to instal drive 4 .own personal music Hid usb thermometer temperature recorder-1 FUNCTION:1, thermometer: -40~+120 C;2, alarm sound3 ... indication: Red light when working6, Recharging method: PC or USB port adapter7, Support Windows ,XP, VIST;8, Memory requirement ... t click this button . ( first) (second) 6 Function of Option(1.UNIT , "Certigarde " and " Fahrenhert" for selection.(2. CALIBRATION, ...