【Sensitive Sensor】0.5s response time, non-contact. Noise levels can be measured in any situation, with accurate measurement results quickly displayed. [LCD Display] Large-size backlit LCD display, clear and easy to read at night. Low radiation, reducing eye damage. [Accurate measurement] Measuring range 30~130dBA; accuracy +/- 1.5dB, resolution 0.1dB [Multi-function] Data retention function; maximum/minimum sound level measurement; 15-minute automatic power-off and voice level up to 130dB time alarm function. [Power supply] Powered by a 9V battery (included) Weighted frequency: A Measurement range: 30dB-130dB Accuracy within +/- 1.5dB Resolution: 0.1dBA Response time: 0.5 seconds Operating temperature: 0~40C (32~ 104F) Operating Humidity: 10~90% RH Storage Temperature: -10 ~ 60 C (14 ~ 140 F) Storage Humidity: 10~70% Relative Humidity Size: Approx. 170 (L) x 58 (W) x 35 (H) mm (6.7 x 2.3 x 1.4 inches) Weight: Approx. 107 grams Power supply: One 9V battery Main functions Data retention function Maximum/minimum display 15 minutes automatic shutdown Large LCD display Package contents: 1x Digital Sound Level Meter 1x 9V Battery How loud is too loud? Government studies show that the safe exposure limit is 85 decibels for eight hours a day. If you are continuously exposed to loud sounds, your hearing may be damaged. 20dB: very quiet, 40dB: soft, 60dB: quite moderate, 85dB: critical 90dB: loud, 100dB: very loud 110dB: very low, 120dB: dangerous This decibel meter is ideal for industry and home. It can easily measure the noise levels of household appliances, neighbor pets, city construction, offices, road vehicles, etc. Measurement tips: 1) When using the device outdoors, please install a windproof ball on the device. The device on the head protects against the effects of wind. 2) If you want to measure the sound level at A, you cannot ignore the influence of other sound sources. 3) Please measure multiple times to obtain a relatively stable reading. S'Please note: 1) If not used for a long time, please take out the 9V battery. 2) Please do not use it in high temperature or humid environment. Product quantity: 1 piece Color: yellow black Size: 170*58*35(mm)