Apple Watch Series 3
Tech specs 
Size38.6mm x 33.3mm x 10.7mm (H x W x D)
32.0mm x 35.9mm x 10.7mm (H x W x D)
MaterialAluminum, Ceramic (White, Black), Sapphire Crystal, Gold Aluminium, Stainless Steel (Silver, Black)
Chargingwireless charging
Battery life18+ hours
Water-resistance5 ATM (50 metres)
Weight53 grams
SensorAmbient light, heart rate sensor, accelerometer, gyroscope, GPS, barometric altimeter
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: S3 dual-core processor
MEMORY: 512 RAM, 16GB storage
CONNECTIVITY: Bluetooth 4.0, NFC, WiFi, LTE and UMTS cellular radio
Activity tracking 
Calories burnedYes
Heart rateYes
Stress & recovery
Pulse Ox
Respiration rate
UV exposure
Skin temperature
Galvanic skin response
Hydration level
Calorie intake
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.
Non-fitness functions 
Smartphone notificationsYes
On-board music storageYes ( Stream Apple Music direct to watch)
Connected payYes
Affiliate link*Amazon
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