Apple Watch 40mm Series 4 Aluminum vs Yezz C21
Apple Watch 40mm Series 4 Aluminum
Yezz C21
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Network
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2G networkGSM 850, 900, 1800, 1900GSM 850, 900, 1800, 1900
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3G networkHSDPA-
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4G networkLTE-
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GPRSYesUp to 48 kbps
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EDGEYesNo
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Availability
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Oficially announced2018-92016-7
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Status2018-92016-8
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Design
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BuildAluminum frame; all-ceramic/sapphire crystal back-
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SIMElectronic SIM card (Apple e-SIM)Dual SIM (Mini-SIM)
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Height40 mm113 mm
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Width34 mm48.5 mm
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Thickness10.7 mm14.6 mm
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Weight30 g70 g
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Waterproof50m-
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ColorsGray, Gold, SilverBlack, Blue, Red, White
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Display
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Display typeLTPO AMOLEDTFT
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Physical size1.57 inches1.8 inches
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Resolution394 x 324 pixels128 x 160 pixels
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Pixel density326 ppi114 ppi
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Display colors16777216262144
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ProtectionIon-X strengthened glass-
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MultitouchYes-
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Display features3D Touch display, 1000 nits-
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Hardware
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CPUDual-core321 MHz
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ChipsetApple S4Spreadtrum SC6531DA
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GPUPowerVR-
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Internal storage16 GB4 MB
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Memory RAM-4 MB
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Memory card-microSD
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Memory card max-8 GB
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Phonebook-Yes
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Call records-Yes
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OS
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OSwatchOS 5.0-
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Main camera
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Primary cameraNoVGA
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Primary camera video-video
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Camera features-No
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Sound
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3.5mm jackNoNo
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LoudspeakerYesYes
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NotificationsVibration; RingtonesVibration, Polyphonic, MP3
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Multimedia
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RadioNo-
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Radio FM-Stereo FM radio
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Connectivity
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WLANWi-Fi 802.11b, 802.11g, 802.11n
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USBNomicroUSB 2.0
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Bluetoothv5.0v2.1
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Bluetooth A2DPYes-
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bluetooth LEYes-
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NFCYes-
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GPSYes, with A-GPSNo
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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
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WAP-Yes
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Java-No
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SensorsAccelerometer, barometer, gyro (second gen), heart rate-
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Browser
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HTMLNo-
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Battery
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Battery typeLi-IonLi-Ion
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Battery capacity-600 mAh
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Battery removableNon-removableRemovable
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Talk time-3 h
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Standby time18 h180 h
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Selfie camera
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Secondary camera-No
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