Apple Watch 42mm vs NIU GO 21
Apple Watch 42mm
NIU GO 21
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Network
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2G networkGSM 850, 900, 1800, 1900
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GPRSYes
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EDGE
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Availability
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Oficially announced2014-92014-5
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Status2015-42014-6
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Design
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BuildStainless Steel-
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SIMNoDual SIM (Mini-SIM)
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Height42 mm105 mm
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Width35.9 mm44.9 mm
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Thickness10.5 mm14.2 mm
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Weight50 g66 g
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ColorsBlack Link Bracelet, Blue/Stone Leather Loop, Black/Blue/Brown Buckle, Stainless Steel/Red, WhiteBlack, Blue, Gray, Green, Orange, Red
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Display
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Display typeAMOLED capacitive touchscreenTFT
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Physical size1.65 inches1.8 inches
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Resolution390 x 312 pixels128 x 160 pixels
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Pixel density303 ppi114 ppi
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Display colors1677721666560
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Hardware
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CPU520 MHz
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ChipsetApple S1-
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GPUPowerVR SGX543-
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Internal storage8 GB64 Mbit
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Memory RAM512 MB-
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Memory cardmicroSD
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Memory card max-32 GB
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OS
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OSwatchOS 1.0-
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Sound
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3.5mm jackNoYes
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LoudspeakerYesYes
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NotificationsVibration; RingtonesVibration, MP3 ringtones
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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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USBmicroUSB 2.0
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Bluetoothv4.0v2.1
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bluetooth LEYes-
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Bluetooth EDR-Yes
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GPSNoNo
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Features
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Messaging SMSSMS(threaded view)SMS
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Messaging MMS-MMS
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Messaging EmailEmail-
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Messaging IMIMIM
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Messaging Push MailPush Mail-
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WAP-Yes
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JavaNoNo
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SensorsAccelerometer, gyro, heart rate-
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Browser
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BrowserNo-
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Battery
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Battery typeLi-IonLi-Ion
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Battery capacity250 mAh650 mAh
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Battery removableNon-removable-
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Talk time3 h 40 min6 h
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Standby time22 h200 h
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Main camera
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Primary camera resolution-640 x 480 pixels
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Primary camera video-no
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Selfie camera
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Secondary camera-No
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