Features:Real-time decibel monitoring, temperature and humidity. Widescreen LED color display with adjustable brightness. Rechargeable, 2000mAh capacity lithium battery, low battery indicator on screen. Clear decibel indicator:less than 60DB (green face icon); 60dB~75DB (yellow face icon); 75dB~85DB (orange face icon); 85DB and above (RED face icon). Technical specifications:Measurement range 30~130dB, accuracy 1.5dB, resolution 0.1dB. Temperature range is 14~140F, relative humidity range is 20~85%. Style:Smart design LED display, the screen is clear and easy to read, using the common dBa unit to indicate decibel concentration. Application:This is an excellent smart tool for different fields such as music recording, neighbor noise complaints, industrial environment, office environment, speech therapy, etc.