Extech Instruments 407780A Alkaline Integrating Sound Level Meter with USB

Amazon

4-digit multifunction LCD with analogue bar graph Precise linearity over wide range (100dB) Programmable integrating time A and C frequency weighting Real time calendar/clock, Weight: 0.6834330122 pounds, Manufacturer: Extech

Test-meter.co.uk

Professional sound level metre with 4-digit LCD, 30-130dB range. Datalogger capacity 32,000 readings. Meets IEC 61672-1 Type 2. USB interface, Windows® software included.