BLACK HONOR Watch GS Pro, 25 Days Battery, GPS Outdoor Navigation with Route Back, Weather Alerts, Multi-Skiing Modes, 24/7 Heart Rate Monitoring, 500 Songs Storage - Charcoal Black Details Operating system Android Wear 1.0 Memory storage capacity 4000 MB Special features sleep_tracking, GPS Connectivity technology Bluetooth Wireless communication standard Bluetooth Battery cell composition Lithium Ion GPS Built-in GPS Shape Round Screen size 1.39 Inches Brand HONO