Can the RGB lights be turned off?
Yes, the lights can be turned off. Short press the led button can change the light mode.
What should I do when I plugged it into my computer it only show the lights and not play any audio?
Please check if the 3.5mm AUX cable is pluged correctly to headphone jack and make sure that "Headset Realtek Audio" is selected as your computer playback device.
How long of the cable between two speakers?
The length of the cable between two speakers is 5FT(1.5M). The whole cable length is 5.74FT(1.75M).
How to change the Mode between Bluetooth and Wired?
Long press the M/Play button for 2 seconds to switch modes from Aux to Bluetooth. Use your device to search BT name "MINI2" to connect it.
If you need to disconnect it, just double-press the M/Play button.