Reed ST-4023 Sound Level Meter and Data Logger, 30-130dB Range, +/-1.5dB Accuracy

Conforms to IEC61672-1 Class 2 sound level meters. 1/2" electret condenser microphone. 4-digit LCD with bargraph indication. A and C frequency weighting. Fast and Slow time weighting. Maximum hold with elapsed time indication. Manual data memory and read. Datalogging function (99 sets). Analog AC and DC outputs. Includes batteries, adjustment screwdriver, wind shield ball, and instruction manual. Specifications: Measurement Range: 30 to 130dB. Resolution: 0.1 dB. Accuracy: +/-1.5 dB. Frequency Range: 31.5 Hz to 8 kHz. Frequency Weighting: A and C. Time Weighting: Fast and Slow. Microphone: 1/2" Electret condenser microphone. Display: 4 digital LCD, updated every 0.5s; quasi analog bar indicator 1 dB steps, 60dB display range, updated every 0.125s. Memory capacity: 99 data sets. Analog output: 2VACrms (f.s.), 10mVDC/dB. Power supply: Four 1.5V LR-6/AA size alkaline batteries, AC adapter. Battery life: about 50 hours. Measures 258mm length by 68mm width by 27mm height.