TRSI TA654B Large Screen Wall-mounted Noise Meter Decibel Detector Device Features: 1. High-precision microphone: High-sensitivity 12-inch condenser microphone with high precision, high sensitivity and fast instantaneous response characteristics. 2. Back bracket design: Hidden bracket design, can be placed on the desktop. 3. Upper limit alarm prompt: The upper limit alarm threshold can be set; when the measurement is higher than the set threshold, the buzzer will sound an alarm prompt, and the alarm prompt light will flash. The time can be set to: 6s~120s. 4. Back panel design: There are 2 ventilation holes on the top and bottom, and the response speed is more sensitive. 5. Data storage: The instrument automatically stores data every 2s, and the stored value is the maximum noise value in 2s. The instrument can store data continuously for one year. After one year, the instrument automatically clears the data six months ago, and the user can export the data through the computer software. The record can be cleared (automatically overwrite the first half of the year after one year) 6. Analog bar level indication: The six-grid indicator light 30~75dB displays green, and 76~130dB displays red. Parameters: 1. Measuring range: 30dB~130dB 2. Accuracy: +-1.5dB (based on standard sound source, 94dB 1KHz) 3. Resolution: 0.1dB (less than 100dB), 1dB (greater than 100dB) 4. Frequency weighting: A weighting 5. Frequency response: 31.5Hz~8.5KHz 6. Sampling rate: 2 timessecond 7. Time weighting: fast 0.5 seconds 8. Sensor type: 6mm condenser microphone sensor 9. Test line length: 5 meters 10. Display mode: LED digital tube, single word 4 inches 11. Alarm output: 12V high level 12. Alarm prompt: sound + prompt 13. Data storage: support 13. USB computer communication: support 14. Operating environment: 0~40 degrees Celsius, maximum 80% relative humidity, indoor altitude less than 2000m 15. Storage environment: -10~60 degrees Celsius, maximum 70% relative humidity 16. Dimensions: