Mini data logger testo 174T, 1-channel incl. 2 batt., wall attach.,calibr.prot. Contains LITHIUM-ION CELLS. Does not require labeling according to SV 188, ADR. For monitoring climatic conditions, for example in storage, in offices and in production areas. Memory for 16000 measured values With LCD display for current measured value (with model testo 174H display of the current temperature or humidity value), battery status as well as min/max values Optical limit alarm (freely selectable values) Windows compatible software (data logger programming, for outputting data, graphic and tabular display, printout of data) download software free of charge or order separately. USB interface required for communication between software and data logger. Technical specifications: Model ➀ 1-channel °C logger testo 174T ➁ 2-channel °C/RH logger testo 174H Measuring ranges/resolution -30.0 to +70.0 °C -20.0 to +70.0 °C 0,0 to 100.0 % RH Accuracy ±0.5 °C ±0.5 °C ±3 % RH (2 to 98 % RH) Protection class IP65 IP20 Measurement data memory 16000 Measuring cycle 1 min to 24 h Dimensions (L x W x D) 60 x 40 x 20 mm Delivery incl. 2 x CR 2032 button cell batteries, wall attachment and calibration protocol. Please order USB interface for logger programming separately.