W Series GPS sport watch brings fun to your exercise and excellence to your training. It is a useful tool to measure our performance during exercise and provide accurate information to achieve training efficiency. Running/Cycling/Hiking: Speed, pace, distance and route management. Race: Interactive training by competing with virtual partner and past records. Personal Training Program: Design your own training plan with required intervals and alerts: Run-Time, Rest-Time, Run-Distance, Heart Rate Zone, Loop, RPM-Time. Health Management: Calorie and heart rate management. Customize Your Own Interface: Design your own interface displaying only the parameters you need. 6 axis E-Compass: Built-in digital compass offers a clear direction without lost. Well matched with Posma BHR20 ANT+/Bluetooth dual mode chest belt and BCB20 ANT+/Bluetooth dual mode speed and cadence sensor. Also it is compatible with other ANT+ chest belt/speed & cadence sensors with standard ANT+ protocol. W series support mile display (mph). LED backlight. Rechargeable battery. Waterproof IPX7. Up to 8-10 hrs (Training Mode) / 10 days (Watch Mode without GPS). Language: English, Chinese. Note: PC software CD is not compatible with Mac.