4 LED Lighting EffectsThe speaker adopts LED rainbow light hidden at the bottom. It provides a more attractive lighting atmosphere but protects your eyes when playing games or watching movies. Click the "" button to change the light effect mode, and the light button can turn on/off USB Plug & PlayJust plug in the USB port for power (such as a laptop, PC host, USB port audio adapter) and it will automatic power on. No drivers or software need to be installed. Bluetooth ModePlug the USB connector and click the M button to change into bluetooth mode. Search " R100" on smartphone/tablet and connect. (Note: Need USB Powered) Easy to Use4 independent buttons for easy operation of various functions. Click M button to change PC/Bluetooth Mode, Long press to power on/off. Click button to change light modes, Long press for 3s to clear the bluetooth memory. Click or Long press + and - to volume up/down. Wide CompatibilityThe Laptop Speaker supports m