Apple Watch 40mm Series 4 Aluminum vs Apple Watch Series 2 38mm
Apple Watch 40mm Series 4 Aluminum
Apple Watch Series 2 38mm
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Network
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2G networkGSM 850, 900, 1800, 1900N/A
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3G networkHSDPA-
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4G networkLTE-
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GPRSYesNo
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EDGEYesNo
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Availability
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Oficially announced2018-92016-9
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Status2018-9-
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Design
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BuildAluminum frame; all-ceramic/sapphire crystal backStainless Steel/Ceramic back
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SIMElectronic SIM card (Apple e-SIM)No
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Height40 mm38.6 mm
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Width34 mm33.3 mm
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Thickness10.7 mm11.4 mm
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Weight30 g41.9 g
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Waterproof50m50m
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ColorsGray, Gold, SilverSport band: silver case/white, black case/black; Leather band: silver case/blue, brown, gray, red; Stainless Steel band: silver case/silver, black case/black
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Display
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Display typeLTPO AMOLEDAMOLED capacitive touchscreen
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Physical size1.57 inches1.5 inches
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Resolution394 x 324 pixels340 x 272 pixels
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Pixel density326 ppi290 ppi
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Display colors1677721616777216
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ProtectionIon-X strengthened glassSapphire crystal glass
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MultitouchYesYes
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Display features3D Touch display, 1000 nits-
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Hardware
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CPUDual-coreDual-core
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ChipsetApple S4Apple S2
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GPUPowerVR-
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Internal storage16 GB-
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Memory card-No
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OS
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OSwatchOS 5.0watchOS 3.0
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Main camera
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Primary cameraNo-
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Sound
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3.5mm jackNoNo
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LoudspeakerYesYes
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NotificationsVibration; RingtonesVibration; Ringtones
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Multimedia
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RadioNoNo
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Connectivity
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WLANWi-Fi 802.11b, 802.11g, 802.11nWi-Fi 802.11b, 802.11g, 802.11n
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USBNoNo
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Bluetoothv5.0v4.0
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Bluetooth A2DPYesYes
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bluetooth LEYes-
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NFCYesYes
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GPSYes, with A-GPSYes
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GLONASSYes-
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GALILEOYes-
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QZSSYes-
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Features
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Messaging SMS-SMS(threaded view)
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Messaging Email-Email
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Messaging IM-IM
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Messaging Push Mail-Push Mail
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Java-No
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SensorsAccelerometer, barometer, gyro (second gen), heart rateAccelerometer, gyro, heart rate
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Browser
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HTMLNo-
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Browser-No
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Battery
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Battery typeLi-IonLi-Ion
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Battery removableNon-removableNon-removable
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Standby time18 h-
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