Digital display: 5 digits LCD.
Measuring level: 30~130 dBA， 30~130 dBC.
Resolution：0.1dB.
Accuracy: ±1.5 dB (under reference conditions) .
Frequency range: 31.5 Hz~ 8.5K Hz .
Linearity range: 50 dB .
Frequency weighting: A， C .
Bar graph: 50 dB scale at 1 dB step for monitoring
current sound pressure level display .
Level ranges：30-80 dB； 50-100 dB；
60-110 dB； 80-130 dB.
Time weighting: Fast / Slow .
Microphone: 1/2 inch Electret Condenser microphone .
Max: Maximum hold .
Power supply: 1*9V alkaline cells or DC 9V adapter < Power life: About 30 hrs >.
Self calibration time: 10 sec (every turn on) .
Dimensions: 220×67×32mm .
Weight: approx. 210g(including battery).