1 High sensitivity gps tracker watch 2 3 modes: runing, cycling, swiming 3 Calorie couter / compass / timer 4.SGS/CE/ROHS DGPS (Differential GPS) or WAAS / EGNOS ON (Built by demand)Position 1~-5meter, typicalVelocity: 0.05 meter, typicalDynamic conditionAltitude8,000 meters (60,000 feet) maxVelocity515 metrs/second ( 1000 knots) MaxJerk20 meters/second ,maxacceleration4 G maxMemoryWaypoints260, ...