Large digital LCD display. Measuring range: 30 to 130dB. Features sound and light alarm with adjustable upper limit setting. Default alarm value is set to 130dB at startup; when the measured value exceeds the set threshold, the device emits a "didi" alarm sound and locks the current data reading. Designed with mounting hole for wall installation. Back panel includes multiple heat dissipation vents for improved durability. Ergonomic design. Six-segment noise level indicator: 30-75dB shown in green, 76-130dB shown in red. Specifications: Item Name: Digital Noise Meter Model: TASI Dimensions: 32.3 x 17.3 x 4 cm Measuring Range: 30 to 130dB (dBA) Accuracy: ±1.5 dB (reference sound pressure level, 94dB @ 1kHz) Frequency Response: 31.5Hz to 8.5kHz Frequency Weighting: A Response Time: Fast Microphone: 6mm Condenser Microphone Power Supply: DC 5V 1A via Micro-USB Operating Environment: 0°C to 40°C, 10% to 80% relative humidity Storage Temperature and Humidity: -10°C to 60°C, 10% to 70% relative humidity Color: Black Material: ABS Package Contents: 1 x Noise Meter 1 x USB Power Cable 1 x Hook 1 x Screw 1 x English Manual Note: Light reflection and display differences may cause slight variations in color between the image and the actual product. Measurement error allowed: ±1-3 cm.