There are three modes which are high light mode, breathing light mode which is from bright to dark again from dark to become bright and turn off the light. According to the breathing frequency design it helps to regulate breathing by making it comfortable like having a person breathing together with you. The LED light will keep on and off gradually like our breath to create a relaxing environment. There is a USB 3-port HUB on its bottom which is USB2.0 supporting 480Mbps transmission speed. All of these USB connectors can plug and play and support hot swaps function. Its bottom can spin to adapt to different devices.