BLU J4 vs Xiaomi Watch Color
BLU J4
Xiaomi Watch Color
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Network
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2G networkGSM 850, 900, 1800, 1900N/A
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3G networkHSDPA 850, 900, 1900, 2100N/A
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4G network-N/A
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HSDPA speed21.1 Mbps-
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HSUPA speed5.76 Mbps-
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GPRSYes-
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EDGEYes-
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Availability
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Oficially announced2019-102020-01
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Status2019-102020-01
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Design
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BuildPlasticGlass front, stainless steel frame, plastic back
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SIMDual SIM (Nano-SIM, dual stand-by)No
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Height151 mm46.2 mm
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Width72.3 mm53.3 mm
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Thickness10 mm11.4 mm
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Weight158 g-
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Waterproof-5ATM
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ColorsBlack, Blue, BrownBlack, Silver
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Display
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Display typeIPS LCD capacitive touchscreenAMOLED capacitive touchscreen
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Physical size5.5 inches1.39 inches
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Resolution720 x 1440 pixels454 x 454 pixels
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Pixel density293 ppi462 ppi
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Display colors1677721616777216
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MultitouchYes-
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Hardware
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CPUQuad-core 1.3 GHz Cortex-A7
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GPUMali-400-
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Memory RAM1 GB-
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Internal storage32 GB-
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Memory cardmicroSD, microSDHC, microSDXCNo
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Memory card max64 GB-
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StorageeMMC 5.1eMMC
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OS
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OSAndroid 8.1 Oreo Go EditionProprietary wearable platform
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Main camera
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Camera typeSingle-
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Main camera8 MP
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Primary camera video720p@30fps-
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Primary camera flashLED flash-
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Selfie camera
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Selfie camera8 MP
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Selfie camera video720p@30fps-
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Sound
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3.5mm jackYesNo
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LoudspeakerYesYes
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EarpieceYes-
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Multimedia
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RadioFM RadioNo
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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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WLAN WiFi HotspotYes-
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WLAN WiFi DirectYes-
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USBmicroUSB 2.0No
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Bluetoothv4.1v5.0
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Bluetooth A2DPYesYes
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bluetooth LEYesYes
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NFC-Yes
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GPSYes, with A-GPSYes, with A-GPS
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GLONASS-Yes
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Features
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SensorsAccelerometerAccelerometer, barometer, gyro, heart rate
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Browser
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HTMLHTML5-
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Battery
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Battery typeLi-PoLi-Ion
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Battery capacity2200 mAh420 mAh
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Battery removableRemovableNon-removable
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Standby time-356 h
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Cost
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Price75 USD120 USD
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