COROS APEX Pro Premium Multisport GPS Watch with Heart Rate Monitor, 40h Full GPS Battery, 24/7 Blood Oxygen Monitoring, Sapphire Glass, Barometer, ANT+ & BLE, Strava & Training Peaks. The COROS APEX Pro comes with the special developed SPEEDSURFING mode, this workout mode has been developed in close cooperation with GPS-Speedsurfing.com and features all standard disciplines related to our platform. Besides that it feautures a high-accuracy algorithm so the speeds achieved can be validated afterwards. The COROS APEX Pro also supports AUTO-UPLOADING to the GPS-Speedsurfing.com website.