LONG 14 DAY BATTERY: Enjoy extra-long battery and charged up for two weeks of activity with typical use. EASILY COUNT STEPS AND DISTACE: Hit your daily step count goal everyday with at a glance monitoring, and track total distance each day, week, or month. SLEEP QUALITY DATA: Learn when you get your best sleep recovery with sleep tracking of REM, deep sleep, light sleep, even daytime nap duration. HEART RATE AND BLOOD OXYGEN MONITOR: Quickly see how hard you're working with heart rate and blood-oxygen tracking, and even stress monitoring. 52 WATCH FACES: Quickly change the appearance of or your watch face to match your outfit, workout, or mood. Even add your own custom photo background. STRONG GPS: Highly accurate 4 GPS system data keeps location precise using GPS, GLONASS, GALILEO, and QZSS location data. WATER RESISTANT: Durable and flexible high quality brand and watch are water resistant to 5 ATM, ready for seating, swimming, and rainy day outdoor walks. BLUETOOTH MUSIC CONTROL: Tap your watch to control your music or podcast volume and track playback from your phone. LARGE Easy to read 1.7 Inch bright screen with anti-fingerprint coating, slim and soft 20mm silicone strap with up to 8.6 inch (218mm) of wrist wrap.