1. Measuring range: 30dB - 130dB2. Resolution: 0.1dB3. Accuracy: about 1.5dB (based on standard sound source, 94dB@1KHz)4. Sampling rate: 2 times / sec5. Time weighting: FAST 0.125s, SLOW 1s6. Frequency response: 31.5Hz - 8KHz7. Noise display: 4 digits, up to 19998. Microphone: high sensitivity 1/2 inch condenser microphone9. Auto shutdown: 15min (can be manually shut down)10. Operating environment: -10 - 50 degrees Celsius, 80% relative humidity, indoor altitude less than 2000m11. Storage environment: -10 - 50 degrees Celsius, within 70% relative humidity (remove the battery)12. Power supply: 2 x 1.5V AAA (R03/LR03) batteries (not included)13. Display size: about 3.4 x 3.1cm14. Dimensions: about 16.7 x 5.9 x 3.1cm15. Weight: about 114gFeatures:1. High-sensitivity 1/2-inch condenser microphone, high precision, high sensitivity, instantaneous response2. With low voltage display3. Large HD display with white backlighting4. 15 minutes without operation after the automatic shutdown (can be canceled manually)5. Large rangePacking list:- Main unit x 1- Cloth bag x 1- Instruction manual x 1Specification: Package Weight One Package Weight 0.19kgs / 0.43lb One Package Size 20cm * 8cm * 5cm / 7.87inch * 3.15inch * 1.97inch Qty per Carton 60 Carton Weight 12.00kgs / 26.46lb Carton Size 48cm * 43cm * 28cm / 18.9inch * 16.93inch * 11.02inch Loading Container 20GP: 461 cartons * 60 pcs = 27660 pcs 40HQ: 1071 cartons * 60 pcs = 64260 pcs