Garmin Forerunner 745
Tech specs 
Size43.8 x 43.8 x 13.3 mm
MaterialLens material: Corning® Gorilla® Glass DX
Bezel and case material: fiber-reinforced polymer
Battery lifeSmartwatch mode: Up to 7 days; GPS mode with music: Up to 6 hours; GPS mode without music: Up to 16 hours; UltraTrac™ mode: Up to 21 hours
Water-resistance5 ATM
Weight47 g
SensorGPS/GLONASS/GALILEO, barometric altimeter, compass, accelerometer, gyroscope, thermometer, heart rate, Pulse OX
Display240 pixel diameter; sunlight-visible, transflective memory-in-pixel (MIP)
Screen size1.2" (30.4 mm) diameter
ColorsBlack, Blue
OtherPLATFORM: Home Grown OS
MEMORY: 200 hours of activity data
CONNECTIVITY: Bluetooth, ANT+, Wi-Fi
Activity tracking 
Calories burnedYes
Heart rate24/7
Stress & recoveryYes
Pulse OxYes
Respiration rate
UV exposure
Skin temperature
Galvanic skin response
Hydration level
Calorie intake
Running featuresGPS-based distance, time and pace, Running dynamics (with compatible accessory), cadence, performance condition, run workouts, race predictor, foot pod compatible.
Swimming featuresPool swim metrics (lengths, distance, pace, stroke count/rate, calories), Stroke type detection (freestyle, backstroke, breaststroke, butterfly), Swim efficiency (SWOLF), drill logging, pool swim workouts.
Other - outdoor recreation, golf and cycling features
- Physiological measurements: Vo2Max, Training Status, Training Load, Recovery Time, Training Effect, Heat and altitude acclimation, Training load focus, Primary benefit (Training Effect labels) and more.
- Body Batter Energy Monitor
- Incident detection
Non-fitness functions 
Smartphone notificationsYes, Text response/reject phone call with text (Android™ only)
On-board music storageUp to 500 songs, Plays and controls watch music
Connected payYes
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