Sony Walkman Smart B-Trainer

Smart B-Trainer - 16GB, USB 2.0, GPS, IPX5/IPX8, 43g - A first in smart training – wearable music player and fitness tracker in one, for all your fitness needs
- Real-time coaching tells you how you’re performing for an optimal workout
- Automatic song selection motivates and keeps you in your optimum heart rate zone
- Chart your improvement using the Smart-B Trainer App that logs every workout
- Track your performance while running, even without your smartphone
- Waterproof to withstand training in wet conditions