1/2-inch polarized condenser microphone can sensitively detect changes in sound. Automatic shutdown function helps conserve power for this noise tester. Small size and lightweight design make this noise tester easy to carry. A large LCD screen allows for clear and easy reading. Constructed from fireproof ABS material, ensuring durability. Product dimensions: 17cm x 5.8cm x 3.5cm (6.7" x 2.3" x 1.4") (Approx.). Suitable for use in factories, offices, homes, schools, and construction sites. Item Name: Decibel Meter Material: Fireproof ABS Measurement Range: 35-130dB Resolution: 0.1dB Display Digits: 3-1/2 Digits Model Number: HT-80A Frequency Range: 31.5Hz-8kHz Operating Humidity: 10-90% RH Power Source: 9V Carbon Battery (Included) Peak Hold Response Time: 0.5 seconds Time Weighting: Quick Response (125ms) Features: LCD Display, Handheld Design, Clear Readability Microphone: 1/2 Inch Polarized Condenser Microphone Accuracy: 3dB (at 94dB, 1kHz reference conditions) Sound Level Frequency Weighting: A-weighting Operating Temperature: 0-40C (32-104F) Storage Temperature: -10C to 60C (14F to 140F) Overload Indication: "OL" displayed when input exceeds range Auto Power Off: Automatically turns off after 15 minutes of inactivity Package Includes: 1 x Decibel Meter 1 x Battery 1 x English User Manual Note: Due to lighting and screen setting differences, the actual product color may vary slightly from images. Slight dimensional variations may occur due to manual measurement.