1. Sensor: 1/2 inch condenser microphone2. Measuring range: 30-130dB3. Measurement accuracy: about 1.5dB (at reference sound pressure level, 94dB 1kHz)4. Frequency response: 31.5Hz-8.5KHz5. Frequency weighting characteristics: A6. Resolution: 4 digits, resolution 0.1dB7. Dynamic characteristics selection: Fast / Slow8. Automatic shutdown: after about 10 minutes9. Sampling rate: about 2 times/sec10. Power supply: two AAA batteries (not included)11. Data retention: support12. Backlight display: support13. Applicable scenarios: noise measurement in indoor and outdoor, electrical appliances, cars, libraries, construction sites, etc.14. LCD size: about 36x33mm15. Overall size: about 20.5x5.5X3cm16. Weight: about 98gFeatures:1. High-precision condenser microphone, no need to contact, can measure the quality of sound in various environments, quickly and accurately display the test results2. Large screen with backlight display, convenient to use and measure in dark environment3. With bracket design on the back, the desktop can be placed freely for easy viewing of data4. With protective cover, multiple protection, drop-proof, dust-proof and shock-proof5. With cloth bag, convenient storage, light and portableSpecification: Package Weight One Package Weight 0.25kgs / 0.54lb One Package Size 24.8cm * 9.2cm * 5cm / 9.76inch * 3.62inch * 1.97inch Qty per Carton 100 Carton Weight 25.50kgs / 56.22lb Carton Size 52cm * 48cm * 50cm / 20.47inch * 18.9inch * 19.69inch Loading Container 20GP: 213 cartons * 100 pcs = 21300 pcs40HQ: 496 cartons * 100 pcs = 49600 pcs