Coros Vertix 2s GPS Adventure Watch Space Color:Space Around the foot you'll find Accessory size:Size XL Around the foot you'll find a comfortable mesh This affects the power output QZSS) 43 Hours Connects to 5 satellite systems at the same time in dual frequency 22 Hours (With Music) Connects to 5 satellite systems at the same time in dual frequency with offline music Daily Use 40 Days With daily and sleep tracking 36 Days (With Daily Stress) Monitors your stress level throughout the day Charging Time Less Than 2 Hours Memory Internal Memory 32GB Activity Memory 500 Hours Estimates based on outdoor activities Geo Location Satellite Systems GPS EASY TO OPERATE