Our various clocks and multi-functional chronometers are designed to work under the most stringent operating conditions. All of Davtron's new clocks are a two button design that make the pilot's job easier. These clocks display universal time, local time, and elasped time. The advanced clocks add a flight time channel to use for fuel timing. There are two different types of displays available, liquid cyrstal or incandecent; both are readable in high sunlight situations