Features: Built-in GPS chips track your location and activity routes. Monitors real-time value and dynamic chart. Estimates altitude air pressure compass. Multisports with data analysis including running swimming snorkeling cycling climbing and more. Smartphone App with smart notifications and support multi-languages. 100M water-resistant. Convenient USB recharging long standby up to 1 month max. 24 hour working in GPS mode. Specifications: Material: Stainless steel + Complex fiber Watchband Material: Nylon Band / Silicone Band (optional) Nylon Band: Color: Black / Orange (optional) Silicone Band: Color: Black / Orange (optional) Screen Size: 1.28 inch Resolution: 128*128 RAM: 256KB ROM: 1MB Flash: 64MB Compatibility: Suitable for Android 4.4 and above for iOS9.0 and above Battery: 320mAh polymer battery Charging Time: Approx. 3 hours Battery : Approx. 30 days in standby mode; 24 hours in GPS mode Watchband Length: 220mm 145-190mm adjustable Size: 58 * 49 * 14.8mm Weight: 70g Package List: 1 * Watch