Features: Built-in GPS chips track your location and activity routes. Monitors real-time heart rate 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 life 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 Life: 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 * Sports Watch