Power Glass solar charging extends battery life up to 42 minutes per hour in battery saver mode (solar version only)- Up to 35 hours of battery life in demanding use plus up to 70 hours in battery saver mode with solar charging, get up to 45 hours of battery life in demanding use cases and up to 100 hours in battery saver mode (solar version only)- Features: Solar charging (solar version only), stamina insights, cycling abilities/course demands, power guide, dynamic performance monitoring, training status, daily suggested workouts, sync training plans, heat/altitude acclimation, ClimbPro feature, nutrition/hydration alerts, cycling dynamics, MTB dynamics, grit and flow, multi-band GNSS, ride type-specific maps, Trailforks app, forksight mode, turn-by-turn directions, off-course recalculation, Shimano Steps E-Bike system compatible, and more- Dimensions: 2.3" x 4.6" x 0.8", display 3.5" (88.9 mm) diagonal- Weight: 126g and 133g (solar)- GPS mounts available from K-Edge sold separately