Features: OOTDTYM VU Glass: Stable and reliable performance. Easy to use. Steering board: Fourth generation control board, further sharpen the edge of the size. Fourth generation driver drive board instead of the ideal Toshiba 7318IC, improved 7318 drive 2 disadvantages: small rotation indicator board; Adjust the small sensitivity. Small space, easy to install. Well made and durable. Instructions:1. In AC/ DC 12-15V power supply for the transmission board. (independent power transformer or separate winding power board recommended when not in use, 45MA current backlight).2. L, GND, R: this is a low-level control board signal input terminals for connections are players, computer sound cards, first stage and other device signal sources, L, GND wiring, RW respectively: the left side can be the right channel.3. R1 and R2 are two adjustable resistors, the board driver can control the size of the swing hands.4. DC12V backlight power meter is used after the backlight control board is used for voltage regulator.5. Note that the positive and negative head interfaces. To extend the life of the bulb backlight, you can use the following method:1. The brightness of the backlight depending on the conditions to meet the requirements to reduce the operating voltage can be much longer.2. AC power supply 10 - 12V, 10 Euro series with 50 Euro limiting resistor, reducing the impact on the starting filament. Specifications:Material: Plastic + MetalColor: BlackBacklight Voltage: AC/DC 6-12Veaving: 0-500UA ± 10%Resistance: 650Omega; ± 10%Accuracy: ± 5%Approved location: 500UA full scaleVU meter measurement: approx. 35x35x3 7mm/1.38x1.38x1.46" Quantity: 1 SetNote: Please allow 1-3mm error due to manual measurement. Pls make sure you do not mind before you make a bid, due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!No Retail PackagePackage Contents:2 x VU Meter Panel1 x Driver Board5 x Cable