Garmin Foretrex 901 Ballistic Edition GPS Navigator w Applied Ballistics Solver heated gear Ready for off road vehicle use Size:Adult XL Ready for off road vehicle use rest screen and auto detection) Yes Advanced workouts Yes Power Modes customizable in activity battery settings Yes HRM running pace and distance Yes Auto Lap® interval tracking feature Yes Manual lap Yes Rest timer Yes Configurable lap alerts Yes Heat and altitude acclimation Yes VO2 Max (Run) Yes VO2 Max (Trail Run) Yes Realtime stamina Yes Endurance score Yes Load ratio Yes Training load Yes Training load focus Yes Training effect Yes Training effect (anaerobic) Yes Primary benefit (Training Effect labels) Yes Workout benefit Yes Improved recovery time Yes Custom alerts Yes Voice alerts Yes Multisport auto transition Yes Finish time Yes Virtual Partner Yes Race an Activity Yes Auto multisport activities Yes Manual multisport activities Yes Garmin Live Segments Yes Strava Live Segments Yes Round trip course creator (running cycling) Yes Trendline™ Popularity Routing Yes Touch and or button lock Yes Auto scroll Yes Activity history on watch Yes Physio TrueUp Yes Unified training status Yes Running Features GPS based distance Water rating IPX7 MIL STD 810 yes (thermal bare unit only Display Type monochrome MIP Display Size 2