Description The device does not have an OFF switch to shut down and is therefore ideal for continuous monitoring of the environments in the rooms and offices. The device can only be used with the supplied AC adapter included in the delivery. • Range: CO2: 0 to 4000 ppm, T: 0 to 50 ° C, RH: 10 to 95% RH, choice of units °C / °F • Resolution: CO2: 1 ppm, T: 0.1 ° C, RH: 0.1% RH • Accuracy: CO2: ± 40 ppm, T: ± 0.8 ° C, RH: ± (3% of MH 1% RH) • RS232 / USB interface, 9V AC / DC adapter included • Reaction time approx. 1 s, dimensions 132 x 80 x 32 mm, weight 240 g Additional equipment (for extra charge): SD card (1 to 16 GB), USB cable USB-01, RS232 cable UPCB-02, data processing software SW-U801-WIN