Feature: 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. Specification: Item Type: Audio Level Meter Product Material: ABS, PCB Maximum Current Sensitivity: 500uA±10% Internal DC Impedance: 650Ω±10% Insulation Resistance: More than 50MΩ Friction: ±1mm Pointer Length: Approx. 37 ± 1mm / 1.5 ± 0.04in, from needle end to axes Pointer Width: 0.45 ± 0.05mm Meter Installation Position: Vertical Backlight: Yellow background, orange light bulb 12V 55mA Scope of Application: Suitable for DIY, recording studio, medical equipment, etc. Weight: Approx. 184g / 6.5oz. Package List: 2 x VU Meters1 x Driver Board6 x Cables1 x Audio Cable1 x User Manual