It uses Dopplar radar and they claim a within-1 mph accuracy. Works with iOS and Android and captures videos with the speed overlaid. Six hour battery life, and works up to 130 feet away.
The device is currently targeted at baseball, but I assume any speed could be measured. Retail price planned at $300, shipments 2Q16.
Can you think of business uses for this technology? Maybe, measuring the speed of a line or other process, or perhaps how fast tow-motors are moving?