Lutron SL-4023SD Sound Level Meter Class 2, SD Card

\nSD Card real time data recorder\nSOUND LEVEL METER, class 2\nModel : SL-4023SD\n* Real time data logger, save the data into the SD memory card and can be downloaded to the Excel, extra software is no need.\n* Frequency and time weighting meet IEC61672 class 2.\n* Auto range : 30 to 130 dB.\n* 3 manual ranges : 30 to 80 dB, 50 to 100 dB, 80 to 130 dB.\n* A/C frequency weighting.\n* Fast/slow time weighting.\n* Peak hold, Data hold.\n* Record ( Max., Min. ).\n* RS232/USB computer interface.\n* Optional wind shield ball, SB-01.\n* Patented.\n