Our led digital race clocks features a durable and reliable aluminum case with non-glare lenses and IR remote control to select timing modes such as time-of-day, stopwatch, interval timer countdown and count up timer. The display is provided by sunlight legible ultra-bright LEDs with a 90 wide viewing angle. The units can be ordered for single or dual-sided viewing, with 4 or 6 digits depends on your requests. Extra Options also include a tripod, a carrying case, top handle, top hooks, mounting tripod and external battery pack. Please inquire for different sizes, colors, or configurations. Display High visibility and brightness: red,5 inch, 6 inch or 9 inch (102, 152 or 229 mm) tall LEDs readable in bright sunlight. Color Single color: red, blue, green, amber, white or mixed color Display Format 4-digit clocks: 4 digit minute second timing and HH:MM day time display, max value is 99 minutes and 59 seconds 6-digit clocks: 6 digit hour minute second timing and HH:MM:SS day time display, max value is 99 hours 59 minutes 59 seconds Function Modes Time up or time down Time-of-day mode Stopwatch from zero Minute and seconds time interval workout Marathon timer with memory saving feature Enclosure Rugged aluminum frame with matt acrylic cover, smooth edges. Power Default: Electricity, power adapter with 3 meters long cord, UK, US, AU, UK plug available all around the world External Battery pack: Battery powered with sealed, lead-acid battery. 8-10 hours of continuous operation on a single battery charge (typical). Internal battery charger included with power cord and charge indicator.