Features: VA color bright screen: With VA color reverse display, it can be easily displayed and adapt to dark environment Digital: Construction site noise measurement, digital noise meter, making noise detection easier, scene measurement display Applicable place: Usually applicable to office, library, street, audio site, home and other places Noise measurement: For outdoor noise measurements, windshields can be installed to avoid irrelevant noise. Prorective: Silicone handle, smart motherboard, safety protector. Specification Material: Plastic, siliconeelectric components Color: Black Size(L x W x H): About 56 x 29.7 x 163.6 mm/2.2 x 1.17 x 6.44inch Battery: 3pcs AAA 1.5V battery(not included) Measurement range: 35dB ~ 135 db Dynamic range: 50 dB Frequency response: 31.5Hz ~8KHz Accuracy of noise: 2.0 dB Frequency-weighted features: Weighted network Time weighted: fast :125 ms, slow :1 Microphone: 1/2 inch capacitor microphone High and low noise tip: 100DB, display "Hi" symbol, 100DB, displaying the "LO" symbol Temperature range: -20 ~ 70/-4F~158F Temperature accuracy: 1.5/2.7F Resolution: 0.1 Value update: 300ms Battery life: 60 hours Automatic shutdown: automatic shutdown after 15 minutes without operation Operating temperature and humidity: -20~60/-4F~140F, 10%RH~90%RH- Storage temperature and humidity: 20~60/-4F~140F, 10%RH~75%RH Package included: 1pc x Decibel Meter 1pc x User Manual Notice: Due to the light and screen difference, the items color may be slightly different from the pictures. Please allow 0.5-2cm differences due to manual measurement.