Lutron O2H-9903SD O2 Meter + Humidity/Temp., SD Card

\nSD Card real time recorder\nO2 METER + Humidity/Temp.\nModel : O2H-9903SD\n* Real time recorder, save the data into the SD memory card and can be downloaded to the Excel.\n* O2 range : 0 to 30.0 % x 0.1 %.\n* Humidity range : 5 to 95 %RH.\n* Dew point : -25.3 to 48.9 °C, °C/°F.\n* Temp. range : 0 to 50.0 °C, °C/°F.\n* Alarm setting with the beeper sound output.\n* Recorder sampling time : 2 seconds to 8 hours.\n* 2 probes : O2 and Humidity probe.\n* Hard carrying case is included\n* RS232/USB computer interface.\n