For scuba diving, the Swiss company Uemis has a computer with colored OLED display as an assistant made out for you. The Uemis Zurich diver assistant supports 10.000:1 contrast ratio in a colored display, has an intuitive menu control, and 5-way navigation with three non-slip slide controls. The scuba driver assistant can be connected to a PC via USB and the myUemis can also be synchronized in a similar manner. It also has a tank pressure sensor which transmits the tank pressure to the SDA uemis Zurich. The wristbands are available in three different sizes, and the entire unit draws power through a lithium-polymer battery or integrated high-performance solar cells.

Via: OLED Display393112