1. Music IndicatorFeaturing a 20 stage 15 level built in audio level LED display, this allows for EQ adjustment and delivers a visually stunning music display. The acrylic shell design makes it ultra thin and attractive. 2. MaterialsCrafted with high quality materials, this USB powered indicator ensures long lasting performance. Its solid construction guarantees reliability and durability for prolonged use. 3. Versatile CompatibilityCompatible with a wide range of devices, this indicator supports an input voltage of USB 5V/DC 7 24V. It dual channels/mono switching and comes with an input interface of 5mm unbalanced/XH2.54 3P, providing flexibility in connectivity options. 4. Precise ControlWith a frequency response from 50Hz to 20kHz and adjustable sensitivity, this indicator delivers accurate and clear audio representation. The AGC adjustment rate, tone sandhi interval, and equalizer frequency point provide precise control over the sound output.