1. Measuring range: 30dB-130dB
2. Accuracy: +1.5dB (based on standard sound source, 94dB 1KHz)
3. Frequency response: 31.5Hz-8. 5KHz
4. Frequency weighting: A right
5. Response time: about 2 times/second
6. Sensor type: 6mm condenser microphone sensor
7. Digital display: 3 digits
8. Resolution: 0.1dB (less than 100dB), 1dB (greater than 100dB)
9. Alarm prompt mode: sound + display
10. Alarm output: 5V high level
11. Power supply mode: DC5V 1A MicroUSB interface
12. Over-range display: H/Lo
13. Support system: XP, Win7, Win8, Win10
14. Packing list: host x1, power cord x1, hanging hook x2, screws x2, manual x1
15. Size: about 32.3x17.3x4 cm
16. Weight: about 980 grams

Features:
1. High-precision sensitive probe, 6mm condenser microphone sensor, accurate measurement and sensitive response
2. Large screen display, single word 4 inches, the display is clear and clear at a glance
3. The back bracket design can be expanded or folded, and different placement methods can be selected according to different usage scenarios.
4. A variety of fixing methods to meet different usage scenarios, wall-mounted/hanging/hidden bracket/external bracket
5. Sound and light alarm, upper limit alarm value setting, the default alarm value is 130dB at power-on, when the measurement value exceeds the set alarm value, the instrument will sound an alarm and lock the measurement data
6. Partial panel design, multiple cooling vents, safe and durable
7. Analog bar level indicator, noise decibel six bars indicator, 30-75dB is displayed in green, 76-130dB is displayed in red
8. Alarm output, an external alarm can be connected, 3.5mm two/three section headphone plug
9. Silicone operating buttons, comfortable to touch
10. Storage function, the instrument automatically stores data every 2s, and the stored value is the larger noise value in 2s. It can be stored continuously for one year. After one year is up, the data of six months ago will be automatically cleared, which can be used by computer software. Export records
11. Equipped with a USB interface, which can be connected to a computer and provide computer applications. It can communicate with the computer via USB, download records, real-time sampling, print icons and data, etc.