HABOTEST Noise Decibel Tester 1. Specification range: 30-130dBA 2. Accuracy: +1.5dB (94dB@1KHz), +5dB (94dB@8KHz) 3. Frequency response: 30Hz - 8KHz 4. Frequency weighting: A 5. Time weight: FAST 125ms, SLOW 1sec 6. Temperature: -20-60 degrees Celsius/+1.5 degrees Celsius 7. Humidity: 0-100% / +5.0% 8. Size: 58mm x 142mm 9. Accurate detection, convenient operation 10. Small size, easy to carry 11. LCD high-definition backlight digital display, large font reading is clearly visible 12. Function: support bar graph/data hold/backlight/maximum value/minimum value hold/automatic shutdown/low battery indication Note: Shipment without batteries Tips: We sincerely hope that you can leave your Comment and share your experience of using the product so that more friends can know about it.