Garmin's Instinct Solar is a GPS smartwatch takes battery life to a new level by harnessing the power of the sun. Featuring battery life with solar charging: get up to 54 days in smartwatch, military standard toughness, built-in sports apps right on your wrist, notifications straight from your phone to your wrist, GPS, GLONASS and Galileo - your 3 best friends in the wild. Compatible with iPhone and Android with multiple smart features including Find My Phone, Find My Watch, text response/reject phone call with text (Android only) and smart notifications. Activity tracking features including steps and calories burn, gym activity profiles, training and planning and running, cycling and swimming profiles.