LD 8501 Sound Level Meter measures and displays sound levels in dB from 30 to 130 dB with high accuracy. User selectable features include Frequency weighting (A & C), Response Time (Fast & Slow), Data Hold and MAX/MIN recording. Comply with norm of IEC 651 type 2, ANSI S1.4 TYPE 2.

Features:    Digital LCD with Analog Bar-graph and backlight
                   A/C Frequency weighting 
                   Fast/Slow Response time
                   Over-range and Under-range indication
                   MAX/MIN

                  Data Hold

                   Auto Power Off
                   Low power consumption 

Specifications
Applicable standards：IEC61672-1: 2003 Class 2
Measurement range：30 to 130dB
Microphone：1/2 inch polarized condenser microphone
Frequency range：31.5~8000Hz
Accuracy：±1.5dB
Resolution：0.1dB
Data update：500ms
Response time：FAST 125 ms， SLOW 1 s
Standard calibrator：1KHz sine wave @ 94 ors 114dB
Display：3-1/2 digital LCD with analog bar-graph 
Power: One 9V battery
Operating condition: 0 ~ 50°C (32 ~ 122°F)，10 ~ 90% RH，Non-condensing
Storage condition: -20 ~ 60oC (- 4 ~ 140°F)，10 ~ 90% RH，Non-condensing
Weight: 200g 

Dimension: 215mm*58mm*33mm
Accessories：Manual, 9V battery, windscreen,  gifbox package.