Features What You Get: 2 x 500μA VU Panel Meter +1 x Driver Module when you get this set, you can DIY to make a fashioned audio console Recommended independent power transformer, or a separate power supply for the winding. the backlight current is 45 mA when drive plate off work Easy Installtion: The drive signal source can be connected to the amplifier input or audio amplifier output, without changing original circuitry Backlight VU meter: Support two level meter backlight power supply, change the current limiting resistor can be connected to different backlight Tips: The driver board supports two output connection terminals.Rectifier RegulatorThe backlight DC12V power meter is used for rectifier regulator of the backlight driver board Please notice that the positive and negative head interface Features: Driver board: The design of bridge pile rectifier filter circuit, can be a transformer or DC power supply, power supply voltage 12-15V / 300mA. The level swings adjustable, can be compatible with all the different types of table header. The drive signal source can be connected to the amplifier input or audio amplifier output, without changing original circuitry. Support two level meter backlight power supply, change the current limiting resistor can be connected to different backlight. The driver board supports two output connection terminals.  VU meter: Voltage 500MV, Weight: 21 grams, excellent quality, cute appearance, stable and reliable performance. Header DC resistance: 652Ω The backlight of incandescent bulbs. Operating voltage: 6 ~ 12V AC or DC. In the backlight brightness to meet the requirements under the conditions, lower operating voltage, can significantly prolong life. Need to use current limiting resistor in series 100Ω to 200Ω, reduce the impact on the filament boot. Specifications: Material: Plastic + metal Driver board: 6.8cm x 5.5cm/2.67 x 2.16inch VU meter: 3.4cm x 3.4cm/1.33 x 1.33inch Weight: 90g Packing Include:  2 x 500μA VU Meter 1 x AC12V driver Package List