Instruments Professional Digital Sound Level Meter 30 to 130db with Bluetooth;

Great for noise pollution monitoring,factory,office,traffic, home theater setup,health and safety compliance,vehicle noise testing and audio system.

Features
transfer data via Bluetooth connection
Filters-out unwanted signals
Bar graph & Over/under load Indication
A freq. weighting (general sound level measurements), C freq. weighting (checking low-frequency content of sounds)
AC/DC analog signal output for connecting to freq analyzer level recorder, FFT analyzer and graphic record
Factory pre-calibrated

Specifications
Measuring Level: 30-130dB(A), 35-130dB(C)
Level Range: 30-80dB ; 50-100dB ; 60-110dB ; 80-130dB ; 30-130dB
PC interface: Bluetooth+CD Software
Accuracy: +/-1.5dB (under reference conditions)
Resolution: 0.1dB
Range: 31.5Hz-8.5KHz (Frequency) ; 50dB/100dB (Linearity)50dB scale at 1dB step for monitoring current sound pressure level
Sample Rate: 20times/sec
Display: 4 digits
AC Signal Output: 0.707Vrms at FS output impedance approx. 600(ohm)
DC Signal Output: 10mV/dB, output impedance approx. 100(ohm)
Time Weight: FAST / SLOW
Mic: 1/2" Electronic Condenser mic
Max hold function
Environment 0-40°C, 10-80%RH (Operating) ; -10-60°C, 10-70%RH (Storage)
Power: 4xAA 1.5V alkaline batt (included) or DC 6V 100mA (max DC9V) (not incl.)
Batt Life: About 30hrs (alkaline batt)
Size: 256x70x35mm
Weight: 230g (excl. batt)

Set Includes
1 x Professional Sound Level Meter
1 x Sponge Ball (Windscreen Filter)
Bluetooth & CD Software
1 x Output wire cable
1 x English User's Manual
4 x AA Battery