Features:     High Accurancy Measuremetn up to 1%RH. Light weight, pocket-sized design. Take accurate measurement for humidity, temperature, wet bulb and dew point.       Applications:     Maintenance, Utility, Technicians ,and HAVC-service.              Specification :    1.Humidity :1%~99%.   2.Temperature -20.0C~60.0C/-4.0F~140.0F.   3.Temperature Accuracy (TM-184):0.5C/1.0F (0.0C ~40.0C /32F~104F) ;other 2.0C /3.6F.   4.Humidity Accuracy (TM-184) : 1.0%RH (15%RH~90%RH) 2.5%RH (90%RH).   5.Display :Dual LCD Display, humidity detective capability up to 999, and temperature detective capability up to 1999.   6.Temperature sensor :Diode.   7.Humidity Sensor :Capacitor Sensor.   8.Sampling :1 times/second.   9.Power :9V battery\\NEDA 1604\\IEC 6F22 or JIS 006P(Only data logger use), or AC to DC Adapter. (9V/300mA).   10.Resolution :0.1%RH,0.1C,0.1F.   11.Data logging capacity with Memory Size : 30000 data sets.   12.Size :130 x56 x38 mm(LxWxH).   13.Weight :250g.   14.Operating Temperature and Humidity :-20C ~ +60C,   15.Storage Temperature and Humidity :-10 to 60C,   16.Consumption Current :<=10mA.   17.Standard Accessories :Users manual,Carrying case ,MINI USB 4P(MALE) to USB A Type cable, Install CD disk.