Description: 【Sensitive Sensor】0.5s response time, no contact. Sound levels can be measured in all situations and accurate readings are displayed quickly. 【LCD Screen】Large LCD screen with backlight that is easy to read at night. Low radiation, less damage. Specifications: 1. Frequency range: 31.5 Hz to 4 kHz, range: 40 to 130 dB 2. Accuracy: ±3.5 dB (under 94 dB, 1 kHz reference conditions), resolution: 0.1 dB 3. Sound level frequency weighting: A-weighted sound level frequency weighting 4. Microphone: 1/2 inch polarized condenser microphone 5. Display: LCD display 6. Display digits: 3-1/2 digits 7. Response time: 0.5 seconds 8. Time level: fast response (125 ms) 9. Alarm function: OL is displayed when the input exceeds the range 10. Automatic shutdown: Automatic shutdown after 15 minutes of no use 11. Battery: 9V carbon battery 12. Operating temperature: 0~40℃ (32~140℉) Operating humidity: 10-90% RH Storage temperature: -10~60℃ (14~140℉) Storage humidity: 10~75% RH 13. Dimensions: 170 x 58 x 35 (mm) 14. Weight: 107 g