[Sensitive sensor] 0.5s response time, no contact needed. It can measure noise levels in any situation and quickly display accurate results. [LCD Display] Features a large backlit LCD screen for easy reading even at night. Low radiation design minimizes eye strain. [Precise measurement] Measurement range of 30~130dBA; Accuracy of +/- 1.5dB with a resolution of 0.1dB. [Multi-function] Includes data hold feature; Max/Min sound level measurement; Automatically powers off after 15 minutes, with an alarm when sound levels reach 130dB. [Power] Operates on one 9V battery (included). Frequency weighting: 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: -10~60C (14~140F) Storage humidity: 10~70% RH Dimensions: approx. 170 (L) x 58 (W) x 35 (H) mm (6.7 x 2.3 x 1.4 inches) Weight: approx. 107 g Power supply: one 9V battery Main functions Data hold function Display Max / Min 15 minutes auto power off Large LCD display Package Contents: 1x digital sound level meter 1x 9V battery How loud is too loud? Research suggests that the safe exposure limit is 85 decibels for eight hours a day. Prolonged exposure to high volume sounds can lead to hearing damage. 20dB: very quiet, 40dB: soft, 60dB: quite moderate, 85dB: borderline 90dB: loud, 100dB: very loud 110dB: very low, 120dB: dangerous This decibel meter is perfect for both industrial and home use. It can measure noise levels from household appliances, neighbor's pets, city construction, factories, offices, traffic, and more. Measurement Tips: 1) When using outdoors, please attach a windscreen to prevent wind interference. 2) To measure the sound level effectively, be mindful of other noise sources. 3) For stable readings, conduct multiple measurements. Please Note: 1) Remove the 9V battery if not in use for an extended period. 2) Avoid operating in high temperature or humidity environments. Number of products: 1 piece Color: black yellow Size: 170*58*35(mm)