9.6 inch Wall Mounted Decibel Meter Large Screen Environmental Noise Monitor 1. Battery capacity: 4000mAh 3.7V lithium battery 2. Storage function: 2 secondspen, can store for one year 3. Communication with computer: communicate with computer via USB cable 4. Power supply: plug + charge dual-purpose, DC5V 1A Type-C USB interface 5. Measuring range: 30-130dB 6. Accuracy: +-1.5dB (based on standard tone, 94dB@1KHz) 7. Frequency response: 31.5 Hz-8.5 KHz 8. Response time: FAST 9. Microphone: 6mm condenser microphone 10. Digital display: 3 digits 11. Resolution: 0.1dB (less than 100dB), 1dB (greater than 100dB) 12. Function: support alarm prompt (sound + display)alarm output, with computer software, with data storage 13. Size: about 22.8 x 12.5 x 3.2cm Features: 1. Capacitive microphone sensor, ultra-thin metal vibration film, practical output, instant response 2. Capacitive microphone sensor, three-layer conduction layer determines its frequency response and sensitivity. the vibration film is lighter and responds faster 3. Supports USB cable connection to the computer, can read instrument data in real time, and export EXCEL tables 4. Has the characteristics of fast response rate and high measurement accuracy 5. The default alarm value is 130dB when powered on. The indicator light flashes when the alarm is triggered, accompanied by a buzzer alarm sound 6. LED large screen display, energy saving and consumption reduction 7. Supports wall-mounted installation, suitable for multiple scenarios