Specification: Dial Material Chemically Strengthened Glass Bezel Material Stainless Steel Shell Material Fiber Reinforced Polymer Wristband Material Silicone Size 47 x 47 x 15.8 mm Quick Fit Yes (22mm) Weight 87g Waterproof 10ATMScreen Type Sunlight Readable Half Penetrating Type Reflector Screen Size 1.2 Definition 240x 240 Color Screen Yes Battery Type Chargeable Li-ion Battery Battery Duration Intelectual Mode: Max.10 Days GPSMode: Max.18 hours GPS Mode+ Music: Max.7 hours Ultra Tracamp Mode: Max.38hours (Whenheartrateoff) Memory/ Record 16GBClock Function: Date/ Time Zulu/UTC, 12/24h, Week/ Day Synchronous GPSTime Yes Auto Daylight Saving Time Yes Clock Yes Stopwatch Yes Sunrise/ Sunset Time Yes Timer Yes Create Face It Cover Yes Sensor:GPSYes Glonass Yes Compass Yes Optical Heart Rate Yes Altimeter Yes Acceleration Sensor Yes Tenperature Sensor Yes Daily Intelectual Function: Wireless Connectionbluetooth Smart, ANT+, Wi-Fi Connect IQ (Downloaddial, datafields, Widget, tools, App.) Yes Intelectual Notification Yes Calendar Yes Weather Yes Phone Music Control Yes Watch Music Play & Control Yes Music Storage Max.500 Songs Phone Search Yes Watch Search Yes VIRBYes Phone Compatibility Yes Garmin Connect Mobile Compatible Yes Garmin Pay Yes Daily Activity Track: Activity Amount Statistics Yes Sedentary Reminder Yes Auto Target (Dailyactivityautosettingaccordingtoyouractualsituation) Yes Sleep Monitoring Yes Calorie Consumption Yes Climbing Stairs Yes Distance Yes High-intensity Activty Time Yes True Up Yes Move IQYes Fitness Year Record Yes Fitness/GYM: Preload Fitness Activity Streng