My Dknight 4.0 portable speaker's light flashes red and beeps regularly
My wife bought me this speaker on Amazon. It is cylindrical in shape. When the power cord is plugged in and the device is on, the blue light is solid and the red light flashes. If I play the device without the charger plugged in, it will die. If it is plugged in and playing, the device beeps about every 30 seconds. We've tried different power cords, different USB adapters, and we cannot find the manual (if we even received one). Do you have a solution?