Features: 1INCLUDED 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. 2EASY TO ADJUST: A driver board can control 2 VU meter heads with 3 potentiometers and can adjust the backlight brightness and pointer swing amplitude. 3WITH BACKLIGHT: The audio level meter with backlight design easy to operate and can read clearly even in dim environment which is reliable and practical. 4WIDE APPLICATION: This VU meter and driver board kit is suitable for DIY preamplifier home recording equipment or car audio conversion equipment etc. 5RELIABLE 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 MeterProduct Material: ABS PCBMaximum Current Sensitivity: 500uA10%Internal DC Impedance: 65010%Insulation Resistance: More than 50MFriction: 1mmPointer Length: Approx. 37 1mm / 1.5 0.04in from needle end to axesPointer Width: 0.45 0.05mmMeter Installation Position: VerticalBacklight: Yellow background orange light bulb 12V 55mAScope 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