Product Title: VFD Display VU Level Meter Indicator Music Audio Spectrum Display AC220V Features: Multimedia display with simple reference drive circuit and transformer. High brightness and stable quality for multimedia display. Equipped with a simple mono drive circuit and transformer. Display size: 140 x 40mm (5.5 x 1.6"). Simple and easy wiring. Wiring Method: Connect two red wires to a 220V power supply. Connect one green and one black wire to the amplifier output speaker port. Package Included: 1 x Set of VFD Display Attention: Upon receiving the goods, please check the packaging carefully, especially the gas nozzle on the side of the display to ensure it is intact. This product is only suitable for AC 220V; it cannot be used with AC 110V. Enhance your audio setup with this VFD Display VU Level Meter Indicator. It provides a high-brightness multimedia display with stable quality. The device is easy to wire and install, making it a practical addition to your audio system.