The Tekneka 5210 CO2 Humidity Temperature Datalogger comes with internal sensors, it can measure ranges from 0 to 10,000ppm/0 to100%RH/-30 to 65ºC. The large LCD screen (3.9-inch) has a red backlight alert function with an audible beep sound. Tekneka 5210 can record up to 22,528 readings and is very easy to export the data (txt/csv/xls/dlg) without software while connected to a PC via micro-USB. It allows to set of time & date, alarm duration, CO2 limit violation, temperature/humidity threshold, recording interval, and exporting report formats. The touch-sensitive buttons help to navigate the settings menu, start/stop recording, CO2/humidity/temperature (MAX/MIN/AVG) values, and alarm limits. This precise sensor gives you an accurate measured value within 5 seconds of the display refresh interval. It is powered by 3 x 1.5V AAA batteries/USB power supply and the display can be switched off for a long standby time. It is recommended to power the unit by USB power supply as any CO2 sensor would consume higher power as compared to other type of sensors. FEATURES ● 3.9-inch bigger LCD screen for the best viewing experience● Red color backlight alert function for CO2 limits violation● It has a huge storage capacity of recording 22,528 readings● Measuring interval starts from 5 seconds to 120min● Generate report without software in a specific format (txt/csv/xls/dlg)● Audible buzzer alarm available, if it exceeds set limit (CO2, ºC, %RH)● This device can show dew point (Td) temperature● Best touch-sensitive buttons for fast navigation and custom settings● Auto keypad lock to avoid accidental interruption● Shows maximum, minimum, and average readings● This model can support external temperature/humidity sensor● It allows calibrating CO2 at 400ppm range by pressing the CAL button APPLICATIONS ● Widely used in Office environments, Hospitals, Agricultural greenhouses, Breeding facilities, Museums, Pharmaceuticals, Laboratories, Production facilities, Warehouse storage, Home, and Restaurant monitoring. PACKING INCLUDES ● 5210 Main device (Internal sensor)● Micro-USB cable● User manual● 3 x 1.5V AAA batteries● 1 Set of Screws and Wall plug