A fun highlight of CES was rapper 50 Cent‘s demonstration of his new wearable, BioSport In-Ear.

Infrared and accelerometer sensor data will be sent to one’s smartphone via the audio jack, and processed by software that monitors heart rate and steps taken. Wearers can play music in accordance with those metrics to help sustain a target heart rate. The Intel powered, biometric, SMS Audio earbuds will charge wirelessly, eliminating the need for batteries.