1、Large Range: Measurement range: 30.0~130dBA; Accuracy: ± 1.5dB. 2、Maximum/Minimum Value: Press the \"MAX\" key lightly to lock the maximum value, and press the \"MIN\" key lightly to lock the minimum value. 3、High Definition Large Screen Display: The display screen has a white background light, so there is no need to fear working in the dark. 4、Time Weighting: Lightly press the \"F/S\" button to switch between fast (FAST) and slow (SLOW). 5、High Precision Sensor: Highly sensitive 1/2-inch capacitive microphone with high precision, high sensitivity, and fast instantaneous response characteristics. Noise meter is the use of environmental sound level instrument, can be widely used in such as factories, workshops, schools,residential, office areas, traffic roads, audio and other occasions of sound level measurement. Features: Large Range: Measurement range: 30.0~130dBA; Accuracy: ± 1.5dB. Maximum/Minimum Value: Press the "MAX" key lightly to lock the maximum value, and press the "MIN" key lightly to lock the minimum value. High Definition Large Screen Display: The display screen has a white background light, so there is no need to fear working in the dark. Time Weighting: Lightly press the "F/S" button to switch between fast (FAST) and slow (SLOW). High Precision Sensor: Highly sensitive 1/2-inch capacitive microphone with high precision, high sensitivity, and fast instantaneous response characteristics. Specifications: Model: TA650A Material: ABS Range: 30.0~130dBA Accuracy: ±1.5dB (sound pressure reference, 94dB@1kHz) Resolution: 0.1dB Frequency Weighting: dBA Display: 4 digits, max 1999 Frequency Response: 31.5Hz~8kHz Microphone: High precision 1/2 inch microphone Time Weighing: FAST: 0.125s, SLOW: 1s Sampling Rate: 2 times/s Auto Power Off: 15 mins (can be disabled) Working Environment: -10~50℃, Max 80%RH, indoor altitude ＜2000m Storage Environment:  -10~50℃, Max 70%RH (battery removed) Screen Size: 34 x 31mm Power Supply: 2 * 1.5V AAA (R03/LR03) (Not included) Item Size: 167 * 59 * 31mm / 6.57 * 2.32 * 1.22in Item Weight: 114g / 4.02oz Package Weight: 190g / 6.70oz Package Size: 20 * 8 * 4.5cm / 7.87 * 3.15 * 1.77in Package List: 1 * Sound Level Meter 1 * Drawstring Bag 1 * User Manual (English) Package List: 1 * Sound Level Meter 1 * Drawstring Bag 1 * User Manual (English)