Features:-Dual-band GNSS 6 Satellite Positioning Systems-Ultra HD AMOLED Display Screen-Built-in Compass Barometric Altimeter-10 ATM(Dive-proof) Water-resistance-Up to 60 days Battery Life-170+ Sports Modes Smart Recognition-24/7 Easy Health Management-Hi-Fi Bluetooth Phone Calls ...Features:-Dual-band GNSS 6 Satellite Positioning Systems-Ultra HD AMOLED Display Screen-Built-in Compass Barometric Altimeter-10 ATM(Dive-proof) Water-resistance-Up to 60 days Battery Life-170+ Sports Modes Smart Recognition-24/7 Easy Health Management-Hi-Fi Bluetooth Phone Calls -15 U.S. MIL-STD-810H Certifications-316L Stainless Steel High-strength Metal UnibodySpecification Brand Zeblaze Model Stratos 2 Ultra GPS Positioning Dual-band GNSS 6 Positioning Systems (GPS, GLONASS, GALILEO, NAVIC, QZSS, BDS)Assisted GPS for fast fix times Bluetooth Version BT 5.3 Operating Mode Full-Touch Compatible OS Android 5.0 or iOS 11 and above APP Name GloryFitPro Review Share Your Activity Sync Workout Data to Apple Health Strava. UI Language English, Portuguese, Russian, Polish, Spanish, French, Italian, German, Dutch, Turkish, Bengali, Indonesian, Thai, Czech, Hebrew, Hungarian, Romanian, Vietnamese, Finnish, Norwegian, Swedish, Danish, New Zealand, Greek, Arabic, Ukrainian, Korean, Jap