High accuracy "1.4dB meets ANSI and IEC 61672-1 Type 2 standards Stores 99 readings manually and 20M readings via 2G SD card Datalogger date/time stamps and stores readings on an SD card in Excel" format for easy transfer to a PC User programmable sampling rate: 1 to 3600 seconds 30 to 130dB measurement range Auto or Manual ranging AC analog output for connection to an analyzer or recorder Large backlit LCD display Specifications Memory 20M data records using 2G SD card Weighting A and C Analog Output AC Accuracy "1.4dB Noise Range 30 to 130dB (3 ranges) Weight 18.3oz (520g) Response time Fast (125ms) / Slow (1s) Dimensions 9.8 x 2.9 x 1.9in (250 x 73 x 48mm) Frequency range 31.5 to 8000Hz Items Included 6 AA batteries SD Card wind screen hard carrying case