Can memorize 30 groups of measurement results and measuring conditions. DC output:10 mV/dB Permits choice "A", "C", "F" weighting and "Fast"/"Slow" response times. Offers 4 measurement parameters: Lp (sound level); (Equivalent Continuous A Sound Level); Lmax (Maximum Sound Level) and LN (Percent of all readings over alarm value set). Auto range selection and digital display with no guessing errors. Use USB/-232 data output to connect with PC. Provide Bluetooth data output choice., Weight: 1.45615324051 pounds, Manufacturer: Hipzeepo