Its called the Ring Clock, and is meant to be a time telling device worn on one of your fingers. It allegedly uses ultra-thin mono-color LEDs and a ultrathin rechargeable lithium polymer battery (Wearable Technology)
If you often take long road trips, make sure you are ready with an inflatable bed! It takes up very little space, inflates in minutes, and turns any back seat into a comfortable bed! So,no fear to uncomfortable car with limited space.