1、INCLUDED PARTS: Including 2 VU meters and a driver board, and equipped with flat cables and audio cable, easy to connect and drive, convenient and durable. 2、EASY TO ADJUST: A driver board can control 2 VU meter heads, with 3 potentiometers, and can adjust the backlight brightness and pointer swing amplitude. 3、WITH BACKLIGHT: The audio level meter with backlight design, easy to operate, and can read clearly even in dim environment, which is reliable and practical. 4、WIDE APPLICATION: This VU meter and driver board kit is suitable for DIY preamplifier, home recording equipment or car audio conversion equipment, etc. 5、RELIABLE MATERIAL: These accessories are made of excellent ABS and PCB materials, which are impact and wear resistant, and have stable performance.