Outer 0~1024&deg;C, Inner -40~+120&deg;C, USB Thermocouple K Type Thermometer Outer sensor K thermo-element, 1m length, you can change the thermocouple of outer sensor Transition temperature range: 0~+1024C(Accuracy: i. 0~700C: -2~+2C; ii. 700~1000C:-5C~+5 Temperature range of Inner sensor: -40~+120C Resolution:0.25C Without isolation function. Current&lt;10mA Support Windows XP , vista ;win 7,Mac