Features: 1. Composed of Bluetooth stereo module, power amplifier chip, music spectrum, 132 colorful LEDs and other components. 2. Can be connected to Bluetooth to play music and supports stereo output. 3. Equipped with a 3.5mm audio signal input port, which supports wired connection to computers, mobile phones and other devices. 4. When the audio cable is plugged in, it automatically switches to the audio cable signal without being interfered by Bluetooth sound. 5. Music spectrum display, rich colors, beautiful music. Product parameters: Product name: LED Bluetooth audio kit Working power supply: USB power supply 5V (it is recommended to use 5V2A fast charging head) Working voltage: DC5V Working current: mute less than 10mA, full load not less than 500mA PCB length: power amplifier board 91x43mm spectrum board 91x62mm Bluetooth button operation instructions: Short press K1: turn on or off the Bluetooth function (the Bluetooth function will be turned on automatically after power-on) Short press K2: previous song Long press K2: volume - Short press K3: next song Long press K3: volume + Function introduction: Dedicated audio spectrum display driver chip, built-in multiple decoding algorithms, memory function can permanently maintain user-set parameters. Working mode selection: The chip enters normal working status after power-on. If there is audio input, the screen will display the spectrum. Enter working mode selection: 1. Under normal working conditions, regardless of whether the screen is displayed or not, press and hold the 'Function Button'. After about 1-2 seconds, it will enter the 'Working Mode Selection' state. At this time, the screen displays 'Sound', which means that it has entered the 'Sound' mode. "Track selection" mode. 2. Long press the "function button" to change the set working mode and enter the next working mode selection. 3. Short press to change the "optional" of the working mode, and the optional options will be displayed on the screen. 4. You can set your own working mode according to your needs. Exit working mode selection: After setting the working mode you need, there is no need to perform any operations. After 5 seconds, the chip will exit the working mode selection state and enter the normal working state. Special tip: If connected to a single speaker, set it to mono working mode for better display effect. Shipping list: 1*LED bluetooth speaker kit+shell