✔ Adopting 2PCS IN9 Nixie tubes, the orange light feels soft and warm, with strong vintage feelings and can be replaced by IN13 tubes. Specially design bias adjustment, easy to adjust the display height of tube light beam separately ✔ Original IN9 tube music level meter, with 3.5mm AUX input and microphone to achieve wireless pickup, can be matched very well with most common audio device such as mobile phone, computer, CD players, or speakers and so on ✔ Mini size with a sleek appearance, featuring a default cool black shell and knobs. Includes elegant transparent acrylic shell and knobs for replacement, blending seamlessly with any audio equipment style ✔ Support sensitivity adjustment, the spectrum beat rhythm can be quickly set to adapt to different music styles. Generally, slow rhythm corresponds to slower beat, rock, punk and other fast-paced music is more suitable for faster beat ✔ Its exquisite appearance makes it suitable for home, office, or studio audio systems, adding a dynamic flair to your auditory feast