Feature: 1. TECHNICAL PARAMETERS: Decibel meter recorder measuring range from 30~130dB; with ±1.5dB accuracy; Large screen display machine 13 inches; Single word 4 inches 2. HIGH ACCURACY MICROPHONE: The decibel meter features a highly sensitive 1/2in capacitive microphone with high accuracy, high sensitivity and fast instantaneous response 3. BACK STAND DESIGN: The sound level meter has a concealed stand design for tabletop placement. The back panel is designed with 2 ventilation holes above and below each for a more sensitive response speed 4. WITH BUZZER: Decibel meter with upper limit remind prompt can set upper limit remind threshold; When the measurement is higher than the set threshold, the buzzer will give a warning sound and the warning light will flash; The value ranges from 6S to 120s 5. AUTOMATIC STORAGE: Noise decibel meter automatically stores data every 2s, the stored value is the maximum noise value in 2s, the instrument can be stored continuously for one year, after one year, the instrument automatically clears the data of six months ago, and the user can export the data record through the computer software to clear(automatically overwrites the first six months after one year) 6. LEVEL INDICATOR: The wall mount noise meter has an analog bar level indicator, six indicator lights, 30~75dB green, 76~130dB red, clear for you to read Specification: Item Type: Decibel Meter Recorder Material: ABS and LED Measurement Range: 30dB~130dB Accuracy: ±1.5dB (refer to standard sound source, 94dB at 1KHz) Frequency Response: 31.5Hz-8.5KHz Frequency Weighting: A Weighting Response Time: FAST (0.5 seconds) Sensor Type: 6mm electret condenser microphone sensor Display: LED digital tube, Single Word 4in Remind Output: 12V high level Power Supply: DC5V 1A MicroUSB interface Operating Environment: 0-40℃; maximum 80% relative humidity, indoor altitude