XIANQI Sensitive Sensor 0.5s response time, no contact. Can measure noise level under any circumstances, quickly display accurate measurement result.LCD DisplayLarge clear LCD backlight display, easy for reading enen during night. Low radiation, reduce the damage to the eyes.Accurate Measurement Measuring Range 40~130d Accuracy with 0.1dB Resolution. Multi-functionData hold function; Max/Min sound level measurement; 15 minutes auto power off, also has alarm function when voice level is up to 130dB.Power SupplyPowered by a 9V Battery (Included) Size: 17*5.8 cm Color: yellow Include: 1* Noise Meter Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.