Mini USB Sound Noise Level Meter Measure Tester Pressure Decibel 30 ~ 130 Db

Description

Specifications: LCD display: 4 digits LCD size: 2.2 inch (55 mm) Display: 0.5 secretary Measuring Level: 30 ~ 130 dB(A) (A-weighted decibels), 35 ~ 130 dB(C) (C-weighted decibels) Accuracy: ±1.5 dB Frequency Response: 31.5 Hz ~ 8.5 kHz Resolution: 0.1 dB Dynamic Range: 50 dB / 100 dB Overload Indication: OVER / UNDER Frequency Weighting Characteristic: A / C Analog Bar Graph: 1 dB / 1 bar graph Sampling Rate: 20 times / second PWM Signal Output: duty cycle = 0.01 x dB value x 100% / 3.3 Dynamic Characteristic (Time weighting): FAST(high speed) / SLOW(low speed) Calendar Accuracy: ±30 seconds / day The Maximum Value Holding: MAX Microphone: 0.5 inch polarization capacitance microphone Power Supply: 4 x 1.5V AA battery (not include)or USB Cable Power Life: about 20 hours continuous use (alkaline battery) Operating Temperature: 0 ~ 40 °C (32 ~ 104 °F) Operating Humidity: ≤80 % R.H. Dimensions: approx. 256 (L) x 70 (W) x 35 (H) mm (10.1 x 2.8 x 1.4 inch) Weight: approx. 308 g Package Includes: 1 x Sound Level Meter 1 x Sponge Ball 1 x USB Cable 1 x Software CD