Model Number: LD 8506 Brand Name: Leeder Key Specifications/Special Features: LD 8502 sound level meter measures and displays sound levels in dB from 30 to 130 dB with high accuracy. User selectable features includeFrequency 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 backlightA/C frequency weightingDC/AC analog signal outputFast/slow response timeOver-range and Under-range indicationMAX/MIN, data hold, auto power offLow power consumptionExternal 9V DC power supplyData logging and USB interface

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
Outputs: AC/DC signal output from earphone jack
AC=1Vrms, DC=10mV/dB
Output port: Micro USB
Power: One 9V battery or DC 9V
Data logger Memory: 32000 data
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 & dimension: 200g, 215mm*58mm*33mm
Accessories: Manual, 9V battery, windscreen, screw driver, USB cable, 9V power adaptor, 3.5￠ earphone plug, software CD, gifbox package.