Feature:1. Frequency Weighting: It has three weighting modes of A/C/Z, which can be connected to a frequency analyzer or X-Y axis recorder for statistical analysis of data (Z frequency weighting is only for TA652B).2. High Precision Microphone: High-sensitivity 1/2-inch condenser microphone, with high precision, high sensitivity, and fast transient response characteristics.3. Data Storage: It can record and store 1999 groups data; TA652B can connect the PC through the USB to export the data records and generate charts.4. Prompt When Over Upper/Lower Limit: The upper and lower alarm limit can be set separately. When over upper / lower limit, there will be a buzzer alarm sound, and the alarm indicator light will flash.5. USB Connection (only TA652B): With data records download and real-time PC connection function, it can display real-time data sheet and real-time data charts.Specification:Features:Frequency Weighting: It has three weighting modes of A/C/Z, which can be connected to a frequency analyzer or X-Y axis recorder for statistical analysis of data (Z frequency weighting is only for TA652B).High Precision Microphone: High-sensitivity 1/2-inch condenser microphone, with high precision, high sensitivity, and fast transient response characteristics.Data Storage: It can record and store 1999 groups data; TA652B can connect the PC through the USB to export the data records and generate charts.Prompt When Over Upper/Lower Limit: The upper and lower alarm limit can be set separately. When over upper / lower limit, there will be a buzzer alarm sound, and the alarm indicator light will flash.USB Connection (only TA652B): With data records download and real-time PC connection function, it can display real-time data sheet and real-time data charts.Specifications:Model: TA652A, TA652B (Optional)Material: ABSRange: 30~130dBMeasurement Level: 30~70dB, 60~90dB, 80~110dB, 100~130dBAccuracy: ±1.5dB (sound pressure standard, 94dB@1kHz)Resolution: 0.1dBFrequency Weighting: A/C weighting (TA652A), A/C/Z weighting (TA652B)Time Weighting: FAST: 0.125s, SLOW: 1sSampling Rate: 2 times/sFrequency Response: 31.5Hz~8kHzAnalog Bar: One scale represents 1dBDisplay: 4 digits, max 1999Overload: "OVER, HI" "UNDER, LO"Microphone: High precision 1/2 inch microphoneAmbient Temperature: Range: 0~60Accuracy: ±2Analog Signal Output: AC/DC signal is output from the headphone jack; AC=100mVrms; 2.36Vrms/full scale per rangeDC=10mV/dB (TA652B)USB Connection: No (TA652A), Yes (TA652B)Data Storage: 1999 groupsSynchrous Update: Refer to the PC information for program updateAuto Power Off: 15 mins (can be canceled manually)Working Enviroment: -10~50, max 80%RH, indoor altitude 2000mStorage Enviroment: -10~50, max 70%RH (battery removed)Screen Size: 53 x 44mmPower Supply: 3 * 1.5V AA (LR06) batteries (Not included) / USB micro interface 5VItem Size: 229 * 70 * 35mm / 9.01 * 2.75 * 1.37inItem Weight: 215g / 7.58ozPackage Weight: 520g / 18.34ozPackage Size: 29.5 * 10 * 6cm / 11.61 * 3.94 * 2.36inPackage List:1 * Sound Level Meter1 * Cloth Bag1 * User Manual (English)Package List:1 * Sound Level Meter1 * Cloth Bag1 * User Manual (English)