Description: 1/2-inch polarized condenser microphone can sensitively detect changes in sound. Automatic shutdown function can save the energy of this noise tester. Small size and lightweight makes this noise tester very convenient to carry. And the large LCD screen display allows you to read more obviously. Made of fireproof ABS material, it is very durable to use. The length of this product is 17cm, the width is 5.8cm and the height is 3.5cm. It is suitable for factories, offices, homes, schools and construction sites. Item Name: Decibel Meter Material: Fireproof ABS Range: 35-130dB Resolution: 0.1dB Display Digits: 3-1/2 Digits Product Specification: HT-80A Frequency Range: 31.5Hz-8kH Operating Humidity: 10-90%RH Battery: 9V Carbon Battery (Included) The Highest Number Displayed: 0.5sec Time Weighting: Quick Response (125ms) Features: LCD Display, Handheld, Clear Reading Microphone: 1/2 Inch Polarized Condenser Microphone Accuracy: ±3dB (under 94dB, 1KHz Reference Conditions) Accuracy: ±3.5dB (under 94dB, 1KHz Reference Conditions) Sound Level Frequency Weighting: A Sound Level Frequency Weighting Operating Temperature: 0-40 Degree Celsius (32-140 Degree Fahrenheit) Storage Temperature: -10-60 Degree Celsius (14-140 Degree Fahrenheit) Alarm Function: "OL" Will Be Displayed When The Input Exceeds The Range Automatic Shutdown: Automatic Shutdown after 15 Minutes without Any Operation Size Details: Size: 17cm x 5.8cm x 3.5cm/6.7" x 2.3" x 1.4" (Approx.) Notes: 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. Package Includes: 1 x Decibel Meter 1 x Battery 1 x English User Manual