Features: Large clear LCD backlight display that can show the measurement clearly. Turn on the backlight to get the reading easily during the night and reduce the damage to the eyes. 0.5s response for time, no contact. Can measure noise level under any circumstances, quickly display accurate measurement result. Measuring Range 30~130dBA ; +/-2.0dB Accuracy, frequency response: 31.5Hz-8KHz. Portable sound level meter is light and compact design, easy to carry with you and operate with one-hand. Widely applicable to individuals, families, enterprises, learning, industry, etc. Specifications: Material: ABS Size:195x42x24mm/7.7x1.65x0.94in Measuring range: 30~130dB Accuracy: +-2.0dB Frequency response: 31.5Hz~8KHz Dynamic characteristics: FAST, SLOW reaction speed, A/C double weighted measurement Max hold Battery: 2xAAA(included) Package Includes: 1X Sound Level Meter note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.