The 407760 Sound Level Datalogger can store up to 129,920 records and features a USB interface for simple setup and data download. With an accuracy of 1.4dB, the datalogger meets the ANSI and IEC 61672 Class 2 standards. Additional features include A and C weighting, Fast/Slow response time, and two start methods: programmed (from a PC) and manual. Includes software, tripod, USB extension cable, windscreen, and 3.6-volt lithium battery.