1. VARIOUS MEASUREMENTS: Suitable for indoor noise measurement; outdoor noise measurement; electrical noise measurement; interior noise measurement; library noise measurement; construction site noise measurement 2. TEST QUICKLY AND ACCURATELY: High accuracy condenser microphone can measure the quality of sound in environments without contact, and display test results quickly and accurately 3. CONVENIENT MEASUREMENT IN DARK: The screen has a backlit display, which is convenient for measurement in dark environments 4. ACCURATE DETECTION: Detection range from 30~130dB, frequency range is 30Hz~8kHz, possess performance and long service life 5. SCRATCH RESISTANT ABS: Made of good quality ABS material, possess impact resistance, scratch resistance, and environmentally friendly Item Type: Sound Level Meter Model: HT64 Battery: 2 x 1.5V AAA(not included) Application: Indoor noise measurement; outdoor noise measurement; electrical noise measurement; interior noise measurement; library noise measurement; construction site noise measurement Basic Parameters: Detection Range: 30~130dB Frequency Range: 30Hz~8kHz Colour:black Material:ABS Size:180 x 32mm Package Contents: 1X Sound Level Meter 1X Chinese and English manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.