Household Noise Tester Decibel Device 1. Measurement range: 30dB - 130dB 2. Ambient temperaturehumidity: 0-60 degrees C, 0-99% RH (TA651B) 3. Accuracy: 1.5dB or so (based on standard sound source, 94dB@1KHz) 4. Resolution: 0.1dB 5. Time weighting: FAST 0.125s, SLOW 1s 6. Frequency response: 125Hz - 8KHz 7. Sampling rate: 2 times second 8. Analog bar: 1 scale represents 2dB 9. Noise display: 4 digits, up to 1999 10. Microphone: high sensitivity 12 inch condenser microphone 11. Automatic shutdown: 10min (can be manually shut down) 12. Operating environment: -10 - 50 degrees Celsius, within 80% relative humidity, indoor altitude less than 2000m 13. Storage environment: -10 - 50 degrees Celsius, within 70% relative humidity (remove the battery) 14. Power supply: 3 x 1.5V AA (R03LR06) batteries (not included) 15. Display size: approx. 3.7 x 4.1cm 16. Size: about 14.5 x 5.5 x 3.3cm 17. Weight: approx. 115g Features: 1. Highly sensitive 12 inch condenser microphone with high accuracy, high sensitivity and instantaneous response 2. Can set the upper and lower alarm thresholds, when the measurement is higher or lower than the set threshold, the screen red background light on and the measurement value flashing alarm prompt 3. HD large screen display with white background light 4. Automatic shutdown after 10 minutes of no operation (can be manually canceled) 5. Large range range Packing list: - Host x 1 - Cloth bag x 1 - Instruction manual x 1