Extech Integrating Sound Level Meter, 30 to 130 dB

4-digit multifunction LCD with analog bargraph Programmable integrating time A and C Frequency weighting Impulse/Fast/Slow response settings Precise linearity over wide range (100DB) Analog and alarm output features can be used to connect with Frequency analyzers, chart recorders, external dataloggers, and sound level alarms Built-in USB interface with included Windows" datalogging software Display modes: SPL, SPL MIN/MAX, SEL, and Leq Datalogging 32,000 records Condenser Microphone 0.5in (12.7mm) Weight 10.9oz (310g) Measurement Range 30 to 130dB Dimensions 10.4x2.8x0.8in (265x72x21mm) Basic Accuracy "1.5dB