Pebble 2 + HR
Tech specs 
SizeBody dimensions: 39.5 x 30.2 x 11.3 mm
Thinness: 9.8 mm/11.3 mm
MaterialPolycarbonate + 10% Glass Fiber
ChargingTime series cable
BatteryLithium Ion
Battery lifeUp to 7 days
Water-resistanceUp to 30 mètres
Weight31.7 g
Sensoraccelerometer, optical heart rate sensor, microphone
DisplayFlat Corning Gorilla Glass - always on B&W
Screen size144 x 168 pixels
ColorsBlack, White, Aqua, Flame and Lime
OtherPLATFORM: Pebble OS
PROCESSOR: M4 ARM Cortex 100 MHz
MEMORY: 8MB storage, 128k internal RAM
Activity tracking 
Calories burnedYes
Heart rateYes
Stress & recovery
Pulse Ox
Respiration rate
UV exposure
Skin temperature
Galvanic skin response
Hydration level
Calorie intake
Running features
Swimming features
Non-fitness functions 
Smartphone notificationsYes
On-board music storage
Connected pay
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