Garmin fenix 3 GPS Watch, Gray Chroma display - 1.2 sunlight-visible high-resolution color Chroma optically-bonded display.Quick fit watch band compatible: 0.8Inch(26 mm) Water rating - water rated up to 10ATM/ 100 Meters1; suitable for swimming. Case Material: fiber-reinforced polymer Exo antenna - Omni-directional Steel exo antenna, when paired with GLONASS and epo, provides an even faster fix and accurate position than GPS alone Wireless connectivity- utilize one or more Wi-Fi Hot spots to automatically sync your data with Garmin connect and update software (when in range) Battery life - rechargeable battery; up to 20 hours in training/GPS mode, 50 hours in UltraTrac mode, and 6 weeks in watch mode (depends on settings)