1. Measurement range: 30dB - 130dB
2. Accuracy: about 1.5dB (based on standard sound source, 94dB@1KHz)
3. Resolution: 0.1dB (less than 100dB); 1dB (more than 100dB)
4. Frequency response: 31.5Hz - 8.5KHz
5. Sampling rate: 2 times / second
6. Sensor type: 6mm condenser microphone sensor
7. Display mode: LED digital tube, single word 4 inches
8. Alarm output: 12V high level
9. Alarm prompt: sound + prompt
10. Operating environment: 0 - 40 degrees Celsius, within 80% relative humidity, indoor altitude less than 2000m
11. Storage environment: -10 - 60 degrees Celsius, within 70% relative humidity
12. Input: DC 5V/1A
13. Power supply: USB direct plug
14. TA654A test cable length: about 5 meters
15. Size: approx. 32.3 x 17.3 x 4cm
16. Weight: about 980g

Features:
1. Highly sensitive 1/2 inch condenser microphone with high accuracy, high sensitivity and instantaneous response (TA654A external sensor)
2. 13-inch large screen display
3. Back hidden bracket design, can be placed on the desktop
4. A variety of fixed ways, wall hanging / hanging / placed / external bracket
5. Upper limit alarm prompt: the upper limit alarm threshold can be set, when the measurement is higher than the set threshold, the buzzer will alarm prompt sound, and the alarm prompt light flashes, the time can be set to: 65-120s
6. Back panel design, the top and bottom have 2 ventilation holes, more responsive
7. Analog bar level indication
8. Alarm signal output interface, the use of 3.5mm two-section or three-section headphone plug 12V alarm horn (not included)