Feature: 1. WITH SMALL LIGHTS: VU meter driver board design is beautiful and exquisite, with protection bracket, decorative small lights dotted, display effect is very good. The light can be turned on or off according to your preference 2. MULTIPLE FUNCTIONS: Can be used as an sound level indicator or VU meter. You can see the electronic tube lights dancing with the sound signal. Can be used alone or in combination with your device, which is very useful and beautiful 3. EASY TO CONNECT AND USE: The electronic tube driver board adopt humanized design, the sensitivity can be adjusted by sliding knob, no need to screw the potentiometer, no need to connect the sound cable and the extra wire, the 2 sound sockets on the board one side to connect the input and the other to connect the output, plug in and use 4. SENSITIVE AND ADJUSTABLE: 6E2 tube display brightness is more uniform, possess high sensitivity, built in amp circuit, from 1 to full volume can be amplified. And you can flip the switch to select left channel, right channel, stereo, even a dashboard can indicate the volume level of two channels 5. WITH ATTENUATION: Electronic tube driver module onboard tweeter attenuation function, open the switch can highlight the rhythm of bass and drum, so that the display is more dynamic 6. LONG LASTING: Too high and too low filament voltage will shorten the life of the tube, but the driver board has a built in 6.3V filament drive circuit to ensure the service life of the tube Specification: Item Type: VU Meter Driver Board Material: PCB and glass Power Supply: DC 5V. Package List: 1 x Driver Board 1 x Sound Cable 1 x Data Cable