Epson ProSense 57
Tech specs 
Size47.0 x 47.0 x 15.5 mm
MaterialLens Material:Plastic
Band:Urethane
ChargingUSB
BatteryLithium ion
Battery lifeGPS: Up to 13 hours 7 days activity tracking, 30 days Watch Mode
Water-resistance5 ATM (50m)
Weight41 grams
SensorGPS, integrated heart rate sensor, 3-axis accelerometer
DisplayLCD, 128 x 128 pixel resolution
Screen size1.1"
ColorsBlack, kale green and red.
OtherPLATFORM: N/A
PROCESSOR: N/A
MEMORY: Up to the lesser of 64 workouts or 2,000 laps
CONNECTIVITY: Bluetooth
Activity tracking 
StepsYes
DistanceYes
Calories burnedYes
ActivityYes
Floors
SleepYes
Heart rateYes
Vo2MaxYes
Stress & recovery
UV exposure
Skin temperature
Galvanic skin response
Hydration level
Calorie intake
GPSYes
Running featuresBasic Metrics: Distance, time, pace, speed, calories
Advanced Metrics: Stride length, cadence, training effect, VO2 max, race time estimates
Training: Intervals, race mode, customizable workout displays
Swimming features
Other - Time/date, alarm clock, stopwatch, music control
- Sport Modes: Walking, Treadmill
Non-fitness functions 
Smartphone notificationsYes
On-board music storage
Connected pay
Links 
Affiliate link*Amazon
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