Usage Tips:1. Composed of Bluetooth stereo module, power amplifier chip, music spectrum, 132 colorful LED and other components 2. It can be connected to Bluetooth to and supports stereo output 3. Equipped with a 3.5mm audio signal input port, supporting wired connection to devices such as computers and mobile phones 4. When inserting an audio cable, it automatically switches to the audio cable signal and is not affected by Bluetooth sound interference 5. Music spectrum display, rich colors, and beautiful music Product Name: LED Bluetooth Audio Kit Working voltage: DC5V Bluetooth button operation instructions Short K1: Turn Bluetooth function on or off (. Turn Bluetooth function on automatically when powered on) Short K2: Previous song Long K2: Volume- Short K3: Next song Long K3: Volume+ Function Introduction: A dedicated audio spectrum display driver chip with built-in multiple decoding algorithms, and a memory function that can permanently maintain user set parameters. Colour:Photo Color Material:plastic Package Contents: 1 x DIY Bluetooth Speaker Kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.