NOTE: This product can only give people a visual sensory experience, it is not a power amplifier. Type C cable including , DC adapter (5V, 1A) is not included. This unique and eye-catching tuning indicator features a magic eye tube 6E2 that glows and changes shape according to the sound input. It also has a electric circuit board with a neat layout and many electronic components that add to the cyberpunk sci-fi style. Audio signal that enables the 6E2's screen column to follow the size and flashing, the screen glow area is proportional to the signal size, when no signal, the luminous area is the most small, strong signal. The upper and lower light bands expand from both ends to the center until they overlap, excitation in the alterging signal.The 6E2's green electric-eye screen changes with the signal, lifelike like a cat's eye. The double layer Acrylic base gives it a rustic and elegant touch. This is a cool desktop decor that will impress your guests and friends, or a perfect tech gift for men or tech lovers, geeks, electronic enthusiasts. If you are looking for something different and original, this is the item for you! Magic Eye can be used as an audio level indicator or a VU meter. You can see the tube light dancing with your audio signal. You can use it seperately or combine it with your devices, which is very useful and beautiful.