Feature: 1. Auto Adjustment: Adopt single chip microcomputer to process audio signal, better realize exponential gain drive, ultra wide input signal can be adjusted automatically. 2. Good Effect: With automatic gain adjustment function, easily control most input signals, achieve better beat effect, increase sensitivity adjustment to better match different types of music. 3. Reasonable Circuit Layout: The circuit layout is reasonable and concise, the power supply only supplies power to the driver board and VU meter, the sound quality will not be disturbed. 4. Widely Compatible: With standard stereo LR RCA input and output, added microphone pickup for wireless connection, compatible with most common audio equipment. 5. Good Decoration: This analog VU meter adds dynamic visual enjoyment, the backlit can be turned on and off, and the brightness can be adjusted, bright and warm lighting can decorate your desktop or live studio. Specification: Item Type: Dual Analog VU Meter Material: ABS Model: VU1 Audio Input: Stereo RCA Audio Output: Stereo RCA, Microphone Working Voltage: DC 9-18V 200mA Backlit Filament Voltage: DC AC 6-12V Backlit Filament Current: 500μA VU Meter Diameter: Approx.35mm/1.4in Plug: US plug AC 100-240V. Package List: 1 x Dual Analog VU Meter1 x Power Cable4 x Foot Pad2 x Manual