Apple Watch Series 2
Tech specs 
Size38.6mm x 33.3mm x 10.5mm (H x W x D)
32.0mm x 35.9mm x 10.5mm (H x W x D)
MaterialSteel, Aluminum, Ceramic, Sapphire Crystal
Charginginductive charging
BatteryLithium-ion
Battery life18+ hours
Water-resistance5 ATM (50 metres)
Weight25 grams to 69 grams depending on the model
SensorAmbient light, Heart rate sensor, accelerometer, gyroscope, built-in gps.
DisplayOLED Retina display with Force Touch
Ion-X glass (strengthened glass)
Screen size38mm: 340x272 pixels
42mm: 390x312 pixels
ColorsGold, Rose Gold, Space Gray, Silver, Black. Straps vary by editions.
OtherPLATFORM: watchOS
PROCESSOR: Apple S2, dual-core
MEMORY: 512 RAM, 8GB storage (2GB of which can be used for music)
CONNECTIVITY: Bluetooth 4.0, NFC, WiFi
Activity tracking 
StepsYes
DistanceYes
CaloriesYes
ActivityYes
Floors
Sleep
Heart rateYes
Vo2Max
UV exposure
Skin temperature
Galvanic skin response
GPSYes
Running featuresWatch displays up to 5 metrics during your run (time, distance, current pace and average pace, heart rate, active calories or total calories).
Swimming featuresPool swim and open water swim. At the end of a swim, the watch displays the time of day the activity took place, dominant stroke used (auto-detection is used), distance, workout time, pool length, laps completed, average pace, average heart rate, and both active and total calories burned, as well as the weather at your location.
Smartphone notificationsYes
Other Swim tracking: counts laps, track average lap pace and auto-detect stroke.
Links 
View onAmazon | Best Buy | Target | eBay
Amazon US rating4.3 out of 5 stars
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