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Device Specs: Referred (not editable) comparison sheet [3]

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Zeblaze Crystal Smart Watch
Overmax Touch 2.5 Smartwatch
Oukitel A58 Smart Watch
Use the following link to refer to this comparison
 Zeblaze Crystal Smart Watch
 		Overmax Touch 2.5 Smartwatch
 		Oukitel A58 Smart Watch
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IntroductionIntroduction
ReleasedFirst official market release date in (year, month) 2015 Aug 21 2015 Aug 12 2016 Oct
Device CategorySmartphone, tablet, smart watch, PDA, palmtop, etc. Smartwatch Smartwatch Smartwatch

Physical AttributesPhysical Attributes
WidthWidth is horizontally measured between the left and right edges of device according to the default display orientation 41.5 mm 44.5 mm 35 mm
HeightHeight is vertically measured between the bottom and top edges of device according to the default display orientation 49 mm 44.5 mm 47 mm
DepthDepth refers to the thickness of the device. Depth is usually the smallest dimension of the device 10.9 mm 12.2 mm 12 mm
Dimensions 1.63x1.93x0.43 inches 1.75x1.75x0.48 inches 1.38x1.85x0.47 inches
MassThe mass of the device including standard battery and stylus (if any and it can be inserted into the device) measured in grams 47 g 70 g 54 g
1.66 ounces 2.47 ounces 1.9 ounces

Software EnvironmentSoftware Environment
PlatformThe family of the operating system like Android, iOS, Windows Phone/Mobile, Palm OS, etc. Linux Android Linux
Operating SystemPre-installed (usually embedded) operating system which the device was released with. Google Android 4.4.4 (KitKat)
Software ExtrasNavigation software, voice recognition, face recognition, personal assistant app, etc. No No Voice Command

Application processor, ChipsetApplication processor, Chipset
CPUManufacturer part number and most important characteristics of the IC which includes the main application processor or processors MediaTek MT2502C (Aster), 2014, 32 bit, single-core, 28 nm MediaTek MT2502C (Aster), 2014, 32 bit, single-core, 28 nm MediaTek MT2502C (Aster), 2014, 32 bit, single-core, 28 nm

Operative MemoryOperative Memory
RAM TypeType of volatile memory IC which specifies RAM architecture, timing characteristics, refresh mode, voltage levels and physical design of the IC. Two major types of random-access memory is static RAM (SRAM) periodically refreshed dynamic RAM (DRAM). Yes Yes LPDDR2 SDRAM
RAM Capacity (converted)RAM capacity in binary bytes (KiB: 1024 bytes, MiB: 1024 KiB, GiB: 1024 MiB) 128 MiB RAM 64 MiB RAM



Non-volatile MemoryNon-volatile Memory
Non-volatile Memory InterfaceInterface (e.g. UFS 2.0, eMMC 5.1, moviNAND) which determines physical layer (width, clock rate, lanes, protocol) of data transfer between the application processor and the NV memory Yes Yes Yes
Non-volatile Memory Capacity (converted)The value of ROM capacity converted to the most appropriate units (KiB: 1024 bytes, KB: 1000 bytes, MiB: 1024 KiB, MB: 1000 KB, GiB: 1024 MiB, GB: 1000 MB) 64 MiB ROM 128 MiB ROM 128 MiB ROM

DisplayDisplayAll parameters that related to display
Display DiagonalThe distance measured between the furthest corners of the display. In case of display with rounded edges this refers to the diagonal of the smallest bounding rectangle. 39.1 mm 30.98 mm 40.64 mm
1.5 inch 1.2 inch 1.6 inch
ResolutionHorizontal and vertical resolution of the primary display. In case of display with rounded edges this refers to the smallest bounding rectangle. 240x240 240x240 256x320
Horizontal Full Bezel WidthDefined as the sum of width of left and right vertical display bezels. If the display panel is located in the middle width of left and right bezels are the same and their width is the half of the full bezel width. 13.85 mm 22.59 mm 9.61 mm
Display Area UtilizationRegular display area per regular front panel area ratio. This approximated indicator does not count with possible rounded corners (neither on front panel nor on display) or display notches, holes. 37.6% 24.2% 49.0%
Pixel DensityIndicates the number of pixels per inch 220 PPI 278 PPI 256 PPI
Display TypeDisplay technology, e.g. Color/ monochrome e-ink, STN, PM-OLED, AM-OLED, TN-TFT, IPS TFT, ASV TFT, MVA TFT, PVA TFT, PLS TFT Color TN-TFT LCD display Color IPS TFT LCD display Color IPS TFT LCD display
Number of Display ScalesMaximal number of displayable colors or scales 16.8M 16.8M
Scratch Resistant ScreenUsual types: Gorilla Glass generations, DragonTrail/X, Sapphire Glass Yes No Sapphire Glass

Graphical SubsystemGraphical Subsystem

Audio/Video InterfacesAudio/Video Interfaces

Audio SubsystemAudio Subsystem
Microphone(s)Analog or digital sound receiver. Main applications: voice calls, active noise cancellation, voice command, voice/video recording, voice identification No mono mono
Loudspeaker(s) Yes mono mono

Cellular PhoneCellular Phone
Supported Cellular BandsList of supported cellular networks with band names. For example GSM900 refers to the GSM system with the 890-915 MHz uplink and 935-960 downlink bands. No No GSM850, GSM900, GSM1800, GSM1900 bands
Supported Cellular Data LinksList of supported cellular data links and rates. No No CSD, GPRS data links
Complementary Phone ServicesPossible extras: voice transmission, voice speaker, vibration, speakerphone, active noise cancellation, PTT, HD Voice, VoLTE, etc. No Vibrate Voice transmission, Voice speaker, Vibrate, Speakerphone

Secondary Cellular PhoneSecondary Cellular Phone

Control PeripheralsControl Peripherals
Touchscreen TypeDetermines how the touchscreen module senses the touch of the screen Capacitive multi-touch screen Capacitive multi-touch screen Capacitive multi-touch screen

Communication InterfacesCommunication Interfaces
USBFirst or the only USB port. USB is a common high-speed serial bus standard that allows data and power transfer between the mobile device and another computer. Version of USB identifies USB standard. No USB 2.0 USB 2.0
No USB HS (480 Mbps) USB FS (12 Mbps)
USB Services No USB charging USB charging
USB Connector No USB Micro-B (Micro-USB) Proprietary
BluetoothIEEE 802.15 is a short-range radio technology standard that allows transfer of data, and the use of accessories such as wireless audio devices and printers. This field specifies the supported BT version. Bluetooth 4.0 Bluetooth 4.0 Bluetooth 4.0
Wireless LANWireless LAN / WLAN / Wi-Fi: 802.11 defines a medium-range wireless data link that allows for internet access and data transfer. This field enumerates the supported protocols (e.g. 802.11a/b/g/n). No 802.11b, 802.11g, 802.11n No

Multimedia BroadcastMultimedia Broadcast

Satellite NavigationSatellite Navigation

Primary Camera SystemPrimary Camera SystemPrimary camera usually has better imaging capabilities than secondary camera if any

Secondary Camera SystemSecondary Camera SystemWidely used for video telephony or taking selfies

Built-in SensorsBuilt-in Sensors
Built-in accelerometerAn internal component that senses acceleration components of the device. Used for automatic screen rotation and for games and applications that rely on acceleration measurement on X, Y, and Z axis. Possible types: 1D, 2D, 3D Yes Yes Yes
Built-in gyroscopeAn internal component that senses the orientation of the device. Used for automatic screen rotation and for games and applications that rely on the devices position in the X, Y, and Z axis. Possible types: 1D, 2D, 3D Yes No Yes
Additional sensorsBuilt-in ambient (barometer, temperature, altimeter, light, etc.), biometric (fingerprint, HR, step, etc.) and comfort (hall sensor, gesture sensor, proximity, etc.) sensors HR sensor, Step counter HR sensor HR sensor, Step counter

Ingress ProtectionIngress Protection
Protection from solid materialsIngress Protection Standards. IP First digit: Protection from solid objects or materials 6 Totally protected from dust Yes 5 Protected against dust with limited ingress
Protection from liquidsIngress Protection Standards. IP Second digit: Protection from liquids 5 Protected against low pressure jets (all directions), limited ingress Yes 3 Protection against direct sprays up to 60 degrees from the vertical

Power SupplyPower Supply
BatteryBattery technology Li-ion polymer (LiPo) Li-ion Li-ion polymer (LiPo)
built-in built-in built-in
1-cell 1-cell 1-cell
Nominal Battery CapacityIf there are more than 1 cells in the battery in parellel connection the nominal resulting battery capacity is the sum of capacity of cells 280 mAh battery 300 mAh battery 280 mAh battery

Geographical AttributesGeographical Attributes
Market CountriesCountries where the device was officially sold. Overlap is possible. No No China, HK
Market RegionsRegions where the device was officially sold. Overlap is possible. No No Asia
Mobile OperatorList of mobile operators (carriers) or distributors which sold the device in their own network

Datasheet AttributesDatasheet Attributes
Data IntegrityData integrity level determines the integrity of the published information. Final datasheets are not intended to be modified in the future, preliminary ones can be based on unofficial information or speculations, incomplete ones are also preliminary b Preliminary Preliminary Final
AddedThe exact time of the datasheet addition 2015-11-24 17:26 2016-06-20 23:11 2017-03-28 19:07

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