Redesigned and ready to go. The design has undergone a significant change from previous models, giving this new generation of Connected watches a greater sense of flow and ease of use on the go. This TAG Heuer Connected Calibre E4 Sports Smartwatch is the perfect blend of sporty aesthetic and high-end timepiece. At A Glance  Presented on an black rubber strap with steel folding clasp with double safety push buttons Interchangeable straps available separately 45mm stainless steel case with a water resistance of 50m Black steel, rubber crown at 3 o’clock Steel shaped push button at 2 o’clock Steel shaped push button at 4 o’clock Flat sapphire crystal Watch Experience with TAG Heuer custom built app offers watch faces, Sports watch app for swimming, running, cycling, fitness and golf, Wellness app Sensors: heart rate, compass, accelerometer, gyroscope, NFC, microphone, Barometer Charging time: 100% in 1h30 at temperatures between 15° and 45°C Battery life: 1 Full Day (1h Running, 2h Walking, including Wellness), 1 Full Day (5h Golfing, including Wellness)