Apple Watch 38mm vs Apple Watch 40mm Series 4 Aluminum
Apple Watch 38mm
Apple Watch 40mm Series 4 Aluminum
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Network
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2G networkGSM 850, 900, 1800, 1900
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3G network-HSDPA
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4G network-LTE
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GPRSYes
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EDGEYes
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Availability
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Oficially announced2014-92018-9
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Status2015-52018-9
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Design
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BuildStainless SteelAluminum frame; all-ceramic/sapphire crystal back
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SIMNoElectronic SIM card (Apple e-SIM)
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Height38.6 mm40 mm
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Width33.3 mm34 mm
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Thickness10.5 mm10.7 mm
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Weight40 g30 g
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Waterproof-50m
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ColorsBlack Link Bracelet, Blue/Stone Leather Loop, Black/Blue/Brown Buckle, Stainless Steel/Black, Stainless Steel/Red, WhiteGray, Gold, Silver
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Display
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Display typeAMOLED capacitive touchscreenLTPO AMOLED
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Physical size1.5 inches1.57 inches
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Resolution340 x 272 pixels394 x 324 pixels
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Pixel density290 ppi326 ppi
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Display colors1677721616777216
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Protection-Ion-X strengthened glass
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Multitouch-Yes
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Display features-3D Touch display, 1000 nits
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Hardware
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CPU520 MHzDual-core
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ChipsetApple S1Apple S4
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GPUPowerVR SGX543PowerVR
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Memory RAM512 MB-
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Internal storage8 GB16 GB
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Memory card-
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OS
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OSwatchOS 1.0watchOS 5.0
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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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USBNo
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Bluetoothv4.0v5.0
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Bluetooth A2DP-Yes
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bluetooth LEYesYes
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NFC-Yes
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GPSNoYes, with A-GPS
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GLONASS-Yes
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GALILEO-Yes
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QZSS-Yes
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Features
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Messaging SMSSMS(threaded view)-
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Messaging EmailEmail-
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Messaging IMIM-
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Messaging Push MailPush Mail-
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JavaNo-
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SensorsAccelerometer, gyro, heart rateAccelerometer, barometer, gyro (second gen), heart rate
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Browser
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HTML-No
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BrowserNo-
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Battery
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Battery typeLi-IonLi-Ion
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Battery capacity205 mAh-
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Battery removableNon-removableNon-removable
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Talk time3 h-
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Standby time18 h18 h
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Main camera
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Primary camera-No
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