Caution: color: we ship according to the color of the first picture, in the package: if the quantity is not stated in the description, we will ship the item according to the quantity and model number in the title. Pc temper2 sensor usb thermometer hygrometer temperature data logger recorder 4x7a the product is shipped based on the color or size of the main image of the product page. 100% Brand new and high quality ootdty features: the inside sensor for testing temperature of pc and the environment; Outside sensor connected with cable can be put in water for temperature test, and the two can work at the same time supports data recording, dynamic curves analyzing and alarming it can transmit temperature data to files, like excel with numlock/caps lock or "txt" press button supports email. Specifications: range of measuring: -40 to +125°c/ - 40 to +257f resolution rate: 0.06°C precision: ±2°c electricity:< 5ma system: windows nt, xp, vist memory requirements: 20m color: silver cable length: approx. 102Cm/40.15" Usb thermometer size: 60*17*11mm/2.36*0.66*0.43" Quantity:1pc