Features:  Digital Temperature and Humidity Data Logger with Large Data Memory: the instrument integrating acquisition, display, storage and analysis, and has up to 61440 groups of data storage capacity.  Set Up Programming: comes with a CD software, support with Win. OS.  Upper and Lower Limits Setting for Temperature Alarm: the temperature and humidity alarm value can be set, the indicator will flash when the reading  exceeds the set value.  USB Interface Design, Plug and Play: no cable is required, just plug directly into the computer, easy to use.  High Precision Sensor: measuring environment temperature and humidity simultaneously, high accuracy and quick response.  Ultra Low Power Consumption: powered by a 3.6V 1/2 AA lithium battery(NOT included).  IP67 Waterproof and Dustproof: it can be used at most environment, whether it is wet or dusty, it is not limited by the environment.    Specifications:  Material: ABS  Measuring Range: -30~80℃  Precision: Typical±0.5℃  Response Time: 5~30s  Data Memory: 61440 groups  Power Supply: 1 * 3.6V 1/2 AA lithium battery (NOT included)  Item Size: 126 * 28 * 22mm / 4.96 * 1.10 * 0.87in  Item Weight: 47g / 1.68oz  Package Weight: 166g / 5.87oz  Package Size: 15.3 * 9.5 * 4cm / 6.02 * 3.74 * 1.57in    Packing List:  1 * Data Logger  1 * Bracket  1 * CD  2 * Screw  1 * Manual (English)