Product details:

Features:Super large LCD display with Backlight ON/OFF function CO2 / Temperature / Relative Humidity Calendar Time- 12700 data log memory- CO2 level warning alarm - NDIR Sensor (Non-Dispersive Infrared)- Waveguide technology with Automatic Background Calibration(ABC)- Carbon Dioxide (CO2) Range : 0-9999 ppm (Out of scale) Accuracy : 50ppm 5% reading (0-2000) Response time : 10 sec- Temperature Range : - 10-70C (14-158F) Resolution : 0.1C Accuracy : 0.6C / 0.9F)- (0-50C / 32-122F), others 1.2C- Humidity Range : 0.1-99.9% Resolution : 0.1 % Accuracy : 3% (10-90%)- Operating Condition : 0-50C, 0-95% RH (without condensation) Storage Temperature : 0-70C Battery Replacement and Notes :When battery reaches a low level as indicated by LCD not bright or if the CO2 reading is zero, replace the AA X 4 batteries by opening the battery cover.Operate the product using AC power adaptor mostly as mentioned in Operating Instruction / Battery Operation section.Package includes :- CO2 / Temp. / RH DATA LOGGER- AC Power Adaptor (110-240V AC Input, DC 6V Output)- USB Data Cable- PC Software CD ROM (AA Batteries are NOT included)