The PP16LED kit contains such accessories as follows: 1. Acrylic plate x16 2. 10mm plastic screw stud x45 3. 15mm plastic screw stud x3 4. Plastic nut x3 5. Welded and tested 16LED PCBA x1 6. USB-DC power supply line x1 Definitions of key functions: After power on, the audio mode is activated by default and it can jump up and down with music. Press the MODE key to switch the audio mode, lamp flash mode and lamp breath mode. In any mode, press the NEXT key to activate its next dynamic effect.