Adidas MiCoach Pacer
The miCoach Pacer is a small, lightweight device that delivers real-time audible coaching as a user exercises via headphones or combined with their own MP3 player. The device is part of Adidas's miCoach fitness platform. During a run, the miCoach Pacer verbally coaches the runner (i.e. speed up to green zone, slow down to blue zone, etc.) to ensure that they are staying within their targeted heart rate zone and keeps them running at the right personal level.
Adidas also offers a wrist-word device: The miCoach Zone, which features a color-code LED display.