TEMPer2 thermometer is a measurement device using USB port to connect to a computer or other machines. It has two sensors, one is inside and another is extended outside by a cable. The two sensors can test temperature at a same time and the outer sensor is protected from water. It can measure the temperature of the machine and the environment accurately. It must be connect to the computer to start working. TEMPer2 can be use in computer room, weather, environment and special environment temperature testing. Function & Feature Range of measuring: TEMPer2 -40~+120 C; -40~+248F; Resolution rate: 0.06C Precision: + 2C; Electricity:< 5mA; Support Windows NT,XP, VIST; Memory requirement: 20M Data auto save to be txt Or csv form, can be open by excel; Send mails function Graph transfer function