Features:Built-in GPS Navigation System:See and follow your GPS location, helps you find your target destination easily. Perfect for hiking, touring and other outdoor activities.Heart Rate Monitoring:With intelligent and accurate heart rate monitor, it measures your heart rate in real time. You can balance your heart rate through adjusting the intensity of exercise to make your sport activities more effective.Never Miss an Important Call Again:Built-in slot for Nano SIM card, support 3G connection and handsfree phone calls. Also, it supports 2G/3G/WiFi network, with high speed data transmission, you can surf the Internet anytime and anywhere.Your Personal Fitness Assistant:Counts steps, calories and distance throughout the day, helps you to make a scientific fitness plan.Messages Sync:When you receive email, texts or messages from social media softwares on your phone, it will be synchronized and pushed to your smart watch. You can view the text content on the wrist and never miss any important information.Super Long Standby Time:Built-in 1200mAh Lithium Polymer battery plus depth-optimized energy-saving solution, provides you with longer standy time and operation time.Notes:For Android System: 1. You need to download WiiWatch and connect with BT. 2. The pictures shoot by the Remote Control Camera are stored in the Pictures of File Manager. 3. Music Control function is ONLY suitable for Google Music, QQ Music and Kugou Music.For IOS System: 1. You need to download WiiWatch. 2. You can check the pictures in your mobile phone album directly. 3. Music Control function is ONLY compatible with the Music Player comes with the phone.Compatible with Android 5.1 or above and iOS 10.0 or above.