Features: VU Meter: Stable and reliable performance. Easy to use. Driver Board: The fourth generation driver board, further sharpen the edge of the size. The fourth generation of driver board drive board instead of perfect for Toshiba 7318IC, improved drive 7318 2 disadvantages: small swing pointer plate; adjust small sensitivity. Small space, easy to install. Well done and durable. Instructions: 1. In AC/ for DC 12-15V Power Supply for Transmission Plate. (recommended independent power transformer, or a separate winding power supply plate when not in use 45MA current backlight). 2. L, GND, R: This is the driver board The low-level signal input terminals for connections are CD players, computer sound cards, the first stage, and other audio source signal device, L, GND wiring , RW respectively: To the left, the right channel can be. 3. R1 and R2 are two adjustable resistors board driver can control the size of the swing hands. 4. The backlight DC12V power meter is used after the driver board backlight used for voltage regulator. 5. Note that the positive and negative for head interfaces. To extend bulb backlight life, you can use the following method: 1. Backlight brightness according to the conditions to meet the requirements to reduce the operating voltage, can be considerably longer lasting. 2. AC Power 10~12V, 10 Euro Series at 50 Euro Limiting Resistor, reducing the impact on the boot filament. Specifications: Material: Plastic+Metal Color: Black Backlight Voltage: AC/for DC 6-12V Measuring Range: 0-500UA10% Resistance: 65010% Accuracy: 5% Approved Location: Full-scale 500UA VU Meter Size: Approx. 35x35x37mm/1.38x1.38x1.46" Quantity: 1 Set Note: Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! No Retail Package Package Contents: 2 x VU Meter Panel 1 x Driver Board 5 x Cable