1. This is a brand 2 x LM3915 Audio Level Display DIY Kit. It allows you to build your own 10 LED sound audio spectrum analyzer level indicator, which is a project for electronics enthusiasts. 2. With a supply voltage range of DC9V 12V, it is relatively easy to power and operate. You can use a common power adapter within this voltage range. 3. The model is a kit, providing you with all the components to assemble. This gives you the opportunity to learn about soldering and electronics while creating a functional audio device. 4. It features an audio spectrum analyzer that can visually represent the audio levels. You can see how the sound frequency and amplitude are translated into the lighting pattern of the 10 LEDs. 5. The audio level display function enables you to monitor the intensity of the audio signal. Whether it's for analyzing music, sound effects, or other audio sources, this kit is a useful tool for audio enthusiasts and hobbyists.