Composed of a Bluetooth stereo module, power amplifier chip, music spectrum, and 132 colorful LED components. It can connect via Bluetooth for stereo output. Equipped with a 3.5mm audio input port for wired connection to computers and mobile phones. When an audio cable is inserted, it automatically switches to the wired signal and is not affected by Bluetooth interference. Features a music spectrum display with rich colors. Product Name: LED Bluetooth Audio Kit Working Voltage: DC5V Bluetooth Button Operation Instructions: Short press K1: Turn Bluetooth function on or off (Bluetooth turns on automatically when powered) Short press K2: Previous song Long press K2: Volume down Short press K3: Next song Long press K3: Volume up Function Introduction: A dedicated audio spectrum display driver chip with built-in multiple decoding algorithms and a memory function to permanently maintain user set parameters. Color: As shown in photos Material: Plastic Package Contents: 1 x DIY Bluetooth Speaker Kit Only the above package content is included; other products are not included.