?Features:
Sound Level Range: 30dB~130dB
LCD digital display
Anolog bar indicator
Wide dynamic range
Auto/Manual range
Fast/Slow response selectable
MAX value hold function
A/C weighting selection
Date and time display
AC/DC auxilitary output
Back light and Auto Power Off
Low power indication

Specifications:
Measurement range: 30dB ~ 130dB ?
Resolution: 0.1dB
Frequency response: 31.5HZ-8kHz
Dynamic range ratio: 50dB
Frequency weighting: A / C
Time-weighted: FAST is 125ms， 1 second slower
Microphone: electret condenser microphone
Digital Display: 4 digitals
Analog bar display: Each analog bar is 1 db， the sampling rate of 20 times / s
Measuring range: 6 Range :30-80dB / 40-90dB/50-100dB/60-110dB/70-120dB/80-130dB
Auto Range: microcomputers can choose the best measurement range
AC output: 0.707 Vrms of FS (not including auto range mode)， output impedance: approx.600ohm
DC signal output: 10mV/dB， the output impedance approx.100ohm
Power supply: 6 * LR03 AM4 1.5V AAA alkaline batteries (not included)
Dimensions: 245 * 80 * 35mm (L * W * H)

Package Size: 29.5 * 16 * 8cm / 11.5 * 6 * 3in
Package Weight: 787g / 1.7lb

Package List:
1 * MS6700 Sound Level Meters
1 * Headphone Plug
1 * Operation Manual
1 * Windshield