1、It is designed according to following standards, International Electrician Committee Standard: IEC 651 TYPE 2 & ANSI 1.4 TYPE 2. 2、With modern compact and portable appearance design. 3、Accuracy up to ±1.5dB. 4、Maximum value holding function to lock up the maximum reading. 5、Large LCD screen with digits reading. 6、Auto power off design for energy saving. Auto backlight display. 7、Portable, easy-to-use and handy instrument for sound quality control in factory, traffic, family, and audio system. 8、It is designed according to following standards, International Electrician Committee Standard: IEC 651 TYPE 2 & ANSI 1.4 TYPE 2. Equipped with a sponge ball. 9、With modern compact and portable appearance design. Auto power off design for energy saving. 10、Accuracy up to ±1.5dB. Auto backlight display. 11、Maximum value holding function to lock up the maximum reading. Portable, easy-to-use and handy instrument for sound quality control in factory, traffic, family, and audio system. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Ymen Store