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Asus Zenfone 4 Pro ZS551KL vs Celkon Win 400

Compare recorded specifications, size and practical differences.

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    Key differences

    Calculated from recorded specifications using minimum difference thresholds. These are differences, not an overall ranking. For three phones, numeric highlights compare the two extremes.

    • Weight

      Win 400: 54.4 g lighter

      Zenfone 4 Pro ZS551KL:
      175 g
      Win 400:
      120.6 g

    • Width

      Win 400: 10.6 mm narrower

      Zenfone 4 Pro ZS551KL:
      75.6 mm
      Win 400:
      65 mm

    • Screen diagonal

      Win 400: 1.5 in smaller diagonal

      Zenfone 4 Pro ZS551KL:
      5.5 in
      Win 400:
      4 in

    • Chipset

      Zenfone 4 Pro ZS551KL:
      Qualcomm MSM8998 Snapdragon 835 (10 nm)
      Win 400:
      Qualcomm MSM8212 Snapdragon 200 (28 nm)

    • Rear camera layout

      Zenfone 4 Pro ZS551KL:
      Dual
      Win 400:
      Single

    • Depth

      Zenfone 4 Pro ZS551KL: 2.7 mm thinner

      Zenfone 4 Pro ZS551KL:
      7.6 mm
      Win 400:
      10.3 mm

    Physical size

    Relative size, not calibrated actual size. Front and side outlines share one scale and a bottom baseline. Generic outlines use recorded body dimensions, excluding camera bumps.

    1. 1. Zenfone 4 Pro ZS551KL

      Height:
      156.9 mm +31.5 mm versus Win 400
      Width:
      75.6 mm +10.6 mm versus Win 400
      Depth:
      7.6 mm

    2. 2. Win 400

      Height:
      125.4 mm
      Width:
      65 mm
      Depth:
      10.3 mm +2.7 mm versus Zenfone 4 Pro ZS551KL

    Weight

    Bars start at zero and share a scale within this chart.

    1. 1. Zenfone 4 Pro ZS551KL

      175 g

      +54.4 g versus Win 400

    2. 2. Win 400

      120.6 g

    Screen size

    Approximate rectangular screens calculated from recorded diagonal and aspect ratio at one relative scale. Rounded corners and cutouts are not subtracted. These are not phone outlines or calibrated actual sizes.

    1. 1. Zenfone 4 Pro ZS551KL

      Screen diagonal:
      5.5 in
      Aspect ratio (height:width):
      16:9
      Approximate rectangular screen area:
      83.4 cm²

    2. 2. Win 400

      Screen diagonal:
      4 in
      Aspect ratio (height:width):
      5:3
      Approximate rectangular screen area:
      45.5 cm²

    Zenfone 4 Pro ZS551KL has approximately 83.1% more rectangular screen area than Win 400.

    Memory variants

    Each row compares the same storage capacity. Cells show recorded RAM alternatives, not combined maxima. Not recorded does not mean unavailable in every market.

    Recorded RAM for Zenfone 4 Pro ZS551KL, Win 400, compared at the same storage capacity.
    StorageZenfone 4 Pro ZS551KLWin 400
    64 GB 6 GB RAM Unknown
    128 GB 6 GB RAM Unknown
    Win 400: Original memory entry

    4 GB · 512 MB RAM

    Practical features

    Explicit Yes and No values are shown directly. Qualified or regional records retain their details. Unknown means the record is missing.

    1. Zenfone 4 Pro ZS551KL

    NFC:
    Yes
    Headphone jack:
    Yes
    Memory card support:
    See details microSD · up to 512 GB (uses SIM 2 slot)

    2. Win 400

    NFC:
    Unknown
    Headphone jack:
    Yes
    Memory card support:
    See details microSD · up to 32 GB

    Battery capacity

    Capacity is not battery life. No endurance test is implied.

    Recorded battery capacity

    Bars start at zero and share a scale within this chart.

    1. 1. Zenfone 4 Pro ZS551KL

      3600 mAh

      +2100 mAh versus Win 400

    2. 2. Win 400

      1500 mAh

    Specifications

    Open a section for more detail. On narrow screens, swipe sideways or use Left/Right arrow keys while the table is focused. Unknown means missing data, not No. Recorded zero values are shown as recorded.

    1. Zenfone 4 Pro ZS551KL2. Win 400

    Everyday essentials
    Everyday essentials — specifications for Zenfone 4 Pro ZS551KL, Win 400.
    SpecificationZenfone 4 Pro ZS551KLWin 400
    Dimensions (HxWxD)
    • 156.9 Х 75.6 Х 7.6 mm
    • 125.4 Х 65 Х 10.3 mm
    Weight
    • 175 g
    • 120.6 g
    Technology
    • AMOLED
    		 Unknown
    Screen size
    • 5.5" inch
    • 4" inch
    Screen resolution
    • 1080 x 1920 px
    • 480 x 800 px
    Internal memory Recorded storage / RAM variants. Entries are alternatives, not a combined maximum. Ambiguous formats stay as recorded.
    • 64/128 GB
    • 6 GB RAM
    • 4 GB
    • 512 MB RAM
    Memory card support
    • microSD
    • up to 512 GB (uses SIM 2 slot)
    • microSD
    • up to 32 GB
    Battery Capacity is not battery life. No endurance test is implied.
    • 3600 mAh
    • Non-removable Li-Ion
    • 1500 mAh
    • Li-Ion
    Operating system OS
    • Android 7.1.1 (Nougat)
    • upgradable to Android 8 (Oreo); ZenUI 4
    • Microsoft Windows Phone 8.1
    Chipset
    • Qualcomm MSM8998 Snapdragon 835 (10 nm)
    • Qualcomm MSM8212 Snapdragon 200 (28 nm)
    NFC
    • Yes
    		 Unknown
    Headphone jack
    • Yes
    • Yes
    Display
    Display — specifications for Zenfone 4 Pro ZS551KL, Win 400.
    SpecificationZenfone 4 Pro ZS551KLWin 400
    Touchscreen
    • capacitive touchscreen
    • capacitive touchscreen
    Display colors
    • 16M
    • 16M
    Screen area
    • 83.4 cm2
    • 45.5 cm2
    Screen format
    • 16:9 (height:width)
    • 5:3 (height:width)
    Screen to body ratio
    • 70.3%
    • 55.9%
    PPI /points per inch/
    • 401 PPI
    • 233 PPI
    Screen protection
    • Corning Gorilla Glass 5
    		 Unknown
    Camera and Video
    Camera and Video — specifications for Zenfone 4 Pro ZS551KL, Win 400.
    SpecificationZenfone 4 Pro ZS551KLWin 400
    Rear camera, main
    • 12 MP
    • Dual
    • 5 MP
    • Single
    Camera specs
    • 12 MP
    • f/1.7
    • 25mm (wide)
    • 1/2.55''
    • 1.4µm
    • 4-axis OIS
    • dual pixel PDAF & laser AF -16 MP
    • 50mm (telephoto)
    • 1/3.1''
    • 1.0µm
    • 2x optical zoom
    • AF
    • 5 MP
    Functions
    • HDR
    • LED flash
    Video
    • 1080p@30fps
    • 720p
    Front camera, selfie
    • 8 MP
    • Single
    • 1.3 MP
    • Single
    Specifications
    • 8 MP
    • f/1.9
    • 1/3.2''
    • 22mm (wide)
    • 1.4µm
    • PDAF
    • 1.3 MP
    Performance
    Performance — specifications for Zenfone 4 Pro ZS551KL, Win 400.
    SpecificationZenfone 4 Pro ZS551KLWin 400
    Processor CPU
    • Octa-core (4x2.45 GHz Kryo & 4x1.9 GHz Kryo)
    • Quad-core 1.2 GHz Cortex-A7
    Graphics processor GPU
    • Adreno 540
    • Adreno 302
    General specs
    General specs — specifications for Zenfone 4 Pro ZS551KL, Win 400.
    SpecificationZenfone 4 Pro ZS551KLWin 400
    Release date
    • 2017
    • August
    • 2014
    • November
    Colors
    • Moonlight White
    • Pure Black
    • Black
    Historical recorded price Legacy catalogue value; date unknown. Not a current offer.
    • 390 EUR
    		 Unknown
    Battery life
    • Talking time- Up to 27 h 30 min (3G)
    		 Unknown
    Body build
    • Front/back glass (Gorilla Glass 5) & aluminum frame
    		 Unknown
    Communication and Connectivity
    Communication and Connectivity — specifications for Zenfone 4 Pro ZS551KL, Win 400.
    SpecificationZenfone 4 Pro ZS551KLWin 400
    SIM card
    • Hybrid Dual SIM (Nano-SIM
    • dual stand-by)
    • Dual SIM (dual stand-by)
    Network
    • Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 -3G - HSDPA 800 / 850 / 900 / 1700(AWS) / 1800 / 1900 / 2100 -4G - LTE band 1(2100)
    • 2(1900)
    • 3(1800)
    • 4(1700/2100)
    • 5(850)
    • 7(2600)
    • 8(900)
    • 17(700)
    • 19(800)
    • 20(800)
    • 28(700)
    • 38(2600)
    • 39(1900)
    • 40(2300)
    • 41(2500) - Global
    • Taiwan LTE band 1(2100)
    • 12(700)
    • 18(800)
    • 26(850)
    • 29(700)
    • 30(2300)
    • 41(2500) - US
    • Canada
    • Brazil LTE band 1(2100)
    • 41(2500) - India
    • Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
    Speed
    • HSPA 42.2/5.76 Mbps
    • LTE-A (3CA) Cat12 600/150 or 100 Mbps
    • HSPA 21.1/5.76 Mbps
    GPRS
    • Yes
    • Yes
    Edge
    • Yes
    • Yes
    Wi-Fi
    • Wi-Fi 802.11 a/b/g/n/ac
    • dual-band
    • WiFi Direct
    • hotspot
    • Wi-Fi 802.11 b/g/n
    • hotspot
    GPS
    • Yes
    • with A-GPS
    • GLONASS
    • BDS
    • GALILEO
    • Yes
    • with A-GPS
    USB
    • Type-C 1.0 reversible connector
    • microUSB 2.0
    Bluetooth
    • 5.0
    • A2DP
    • EDR
    • LE
    • aptX
    • 4.0
    • A2DP
    Music and Audio
    Music and Audio — specifications for Zenfone 4 Pro ZS551KL, Win 400.
    SpecificationZenfone 4 Pro ZS551KLWin 400
    Radio
    • FM radio
    • FM radio
    Others
    • 24-bit/192kHz audio -DTS sound -Active noise cancellation with dedicated mic
    		 Unknown
    Other features
    Other features — specifications for Zenfone 4 Pro ZS551KL, Win 400.
    SpecificationZenfone 4 Pro ZS551KLWin 400
    Dop
    • Sensors Fingerprint (front-mounted)
    • accelerometer
    • gyro
    • proximity
    • compass
    • color spectrum
    • Infrared port - Fast battery charging: 50% in 32 min
    • Sensors Accelerometer
    • proximity

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