Garmin fnix 3, Sapphire CHROMA DISPLAY - 1.2 sunlight-visible high-resolution color Chroma optically-bonded display SAPPHIRE LENS - High-strength scratch resistant domed sapphire lens (Sapphire version only) 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) Unit Dimensions WxHxD : 2.0 x 2.0 x 0.6 (51.0 x 51.0 x 16.0 mm)