Portable Noise Level Meter: Made of ABS material, small body and compact design fits in hand perfectly, provides comfortable grip and gives you convenient operation. With the small back clip design, you can put it in your pocket or carry it everywhere. Accurate and Sensitive: With frequency range from 20Hz to 8KHz maximum (MAX), accuracy ups to ±1.5dB, measuring scope from 30 to 130dB. Real-time measure the sound level can give you accurate data on the daily use. Wide Application: This noise meter comes with a wind-proof sponge ball, 3 pcs AAA batteries and user manual. It can be used for noise measuring in room, factories, offices, musical inst ent and buildings. Auto Power-off Function: Digital LCD Display & Backlight Function with a resolution of 0.1 dB, easy to read and be used IN THE DARK. Noise meter auto-off without operation after 10 mins, increase working life. Color: As Shown Material: Metal+Plastic Package Contents: 1 x decibel meter with alarm 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 picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.