Garmin Forerunner 935
Tech specs 
Size47 x 47 x 13.9mm
MaterialLens material: glass
Bezel and case material: fiber-reinforced polymer
ChargingYes
BatteryLithium-ion
Battery lifeUp to 24 hours in GPS mode with optical HR; up to 2 weeks in watch mode including optical HR, activity tracking and smart notifications; up to 60 hours in UltraTrac mode
Water-resistance5 ATM
Weight49 g
SensorGPS, barometric altimeter, compass, accelerometer, gyroscope, thermometer, heart rate
Display240 pixel diameter; sunlight-visible, transflective memory-in-pixel (MIP)
Screen size30.4mm diameter
ColorsSlate Gray, Silver, Champagne - comes with interchangeable bands in various colors.
OtherPLATFORM: Home Grown OS
PROCESSOR: Unknown
MEMORY: 64 MB
CONNECTIVITY: WiFi, Bluetooth
Activity tracking 
StepsYes
DistanceYes
CaloriesYes
ActivityYes
FloorsYes
SleepYes
Heart rate24/7
Vo2MaxYes
Stress & recoveryYes
UV exposure
Skin temperature
Galvanic skin response
GPSGPS and GLONASS enabled
Running featuresVO2 max estimate, recovery advisor, race predictor, running dynamics, calculates distance for indoor workouts, personal records, virtual partner/racer
Swimming featuresLengths, distance, pace, stroke count/rate, calories; stroke type identification; open water swim metrics; swim workouts
Smartphone notificationsYes
Other - Physiological measurements: Yes (Recovery time, lactate threshold, FTP, HRV Stress Test, V02 Max for running and cycling, Race Predictor, Training Status, Training Load, Anaerobic Training Effect)
- Running Dynamics (with optional accessory)
- Performance condition
- Run/walk feature: Yes
- many other features...
Custom alerts: Yes
Customisable lap screen
Connect IQ™ support: Yes (watch faces, data fields, widgets and apps)
Wireless connectivity: yes
UltraTrac: Yes
Links 
View onAmazon | Garmin
Amazon US rating4.1 out of 5 stars
Read moreReview