Extech SD500 Humidity and Temperature Datalogger Records data on an SD card in Excel format Dual LCD simultaneously displays relative humidity and temperature readings Datalogger stores readings on an SD card in Excel format for easy transfer to a PC Selectable data sampling rate: 5, 10, 30, 60, 120, 300, 600 seconds or auto Complete with six AAA batteries, 2G SD card, universal AC adaptor, and mounting bracket