ZenFone 4 Pro (ZS551KL) Finish / Color Moonlight White, Pure Black Capacity Internal storage UFS 2.1 64GB / 128GB MicroSD card Supports up to 2TB Google Drive 100GB free space (1 year) Weight and Dimensions 156.9mm(6.17 inches) 75.6mm(2.97 inches) 7.6mm(0.30 inches) Weight: 175 grams (6.17 ounces) Display 5.5-inch Full HD (1920 by 1080) AMOLED display 500nits brightness Over 100% NTSC high color gamut display Front and rear strong 2.5D Corning® Gorilla® Glass 2.1mm slim bezel Bluelight filter for eye care Capacitive touch panel with 10 points multi-touch (support glove touch) Smudge-resistant oleophobic coating Processor CPU: Qualcomm® Snapdragon™ 835 Mobile Platform with 10nm, 64-bit Octa-core ProcessorFinFET LPP (Low Power Plus) powersaving technology GPU: Qualcomm® Adreno™ 540 Memory LPDDR4x 6GB Main Rear Camera 8x light sensitivity low light photos (compared with a typical camera with 16 megapixels, F1.7 & 1.12µm pixel size) ASUS SuperPixel™ Engine - exclusive image processor Sony flagship IMX362 12 megapixels dual pixel image sensor - 1/2.55" large sensor size, 1.4µm large pixel size F1.7 aperture 25mm equivalent focal length in 35mm film camera 6p lens 83° field of view 0.03 seconds TriTech+™ technology - Dual Pixel PDAF, laser auto-focus, subject-tracking auto-focus 4-axis, 4-stop optical image stabilization Color correction (RGB) sensor LED flash PixelMaster camera modes: Auto (with low light and HDR features) Beauty Portrait Pro (RAW file support / up to 32 seconds long exposure) Super Resolution (48 megapixels) GIF Animation Panorama Slow Motion Time Lapse (with power saving) 9 various filters Second Rear Camera 16 megapixels Sony IMX351 image sensor 2x optical zoom, 10x total zoom 50mm equivalent focal length in 35mm film camera Video Recording 4K UHD (3840 by 2160) video recording at 30 fps for rear camera's shake-free videos 1080p FHD video recording at 30 / 60 fps 720p HD video recording at 30 fps 3-axis electronic image stabilization for selfie and rear cameras Slow Motion video (1080p at 120 fps / 720p at 240 fps) Take still photo while recording video Front Camera 8 megapixels Sony IMX319 image sensor 1.4µm large pixel size F1.9 aperture ASUS SuperPixel™ Engine - exclusive image processor 22mm equivalent focal length in 35mm film camera 87.4° field of view Phase detection auto-focus PixelMaster camera modes: Auto (with low light and HDR features) Beauty Portrait Selfie Panorama GIF Animation 9 various filters Audio Speaker Dual speakers 5-magnet speaker with TI Smart Amp for louder, deeper and less distorted sound effect Audio Output Hi-Res audio 192kHz/24-bit standard that is 4 times better than CD quality DTS (Digital Theater System) Headphone:X™ 7.1 virtual surround sound for headphone support Audio CODEC Microphone Three internal microphones with ASUS Noise Reduction Technology FM Receiver FM radio Wireless Technology WLAN 802.11 a/b/g/n/ac 802.11ac Wi-Fi with 2x2 MIMO (DL 866 Mbps) Bluetooth 5.0 Wi-Fi direct NFC Navigation GPS, AGPS, GLO, BDS, GAL SIM Cards Dual SIM dual standby Slot 1: 2G/3G/4G Nano SIM card Slot 2: 2G/3G/4G Nano SIM Card, or the MicroSD card (supports up to 2TB) at a time Both SIM card slots support 3G WCDMA / 4G LTE network band. But only one SIM card can connect to 3G WCDMA / 4G LTE service at a time. Network Standard FDD-LTE, TD-LTE, WCDMA/HSPA+/DC-HSPA+, GSM/GPRS/EDGE Data rate LTE Cat12: UL 100 Mbps / DL 600 Mbps (TW/WW version) LTE Cat12: UL 150 Mbps / DL 600 Mbps (US/CA/BR/CO/JP/IN version) LTE 3CA 4x4 MIMO support (varies by region) DC-HSPA+: UL 5.76 / DL 42 Mbps TW/WW DC-HSPA+: UL 5.76 / DL 42 Mbps FDD-LTE (Bands 1, 2, 3, 4, 5, 7, 8, 17,19, 20, 28) TD-LTE (Bands 38, 39, 40, 41 (2545~2655MHz)) WCDMA (Bands 1, 2, 3, 4, 5, 6, 8, 19) EDGE/GPRS/GSM (850, 900, 1800, 1900MHz) US/CA/BR/CO FDD-LTE (Bands 1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 26, 28, 29, 30) TD-LTE (Bands 38, 39, 41) WCDMA (Bands 1, 2, 3, 4, 5, 6, 8, 19) EDGE/GPRS/GSM (850, 900, 1800, 1900MHz) JP/IN FDD-LTE (Bands 1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 26, 28, 29, 30) TD-LTE (Bands 38, 39, 40, 41) WCDMA (Bands 1, 2, 3, 4, 5, 6, 8, 19) EDGE/GPRS/GSM (850, 900, 1800, 1900MHz) ASUS phone 4G/LTE band compatibility varies by region, please check compatibility with local carriers. Sensor Live fingerprint sensor (0.3 seconds unlock, supports 5 fingerprints), Accelerator, E-Compass, Gyroscope, Proximity sensor, Ambient light sensor, RGB sensor, Laser sensor External Buttons and Connectors Live fingerprint sensor On/Off Sleep/Wake Volume up/down 3.5mm audio jack (1 Headphone/Mic-in) Built-in speaker USB-C connector Battery 3600mAh with fast charging 5 minutes charge for 2 hours talk time 32 minutes charge to 50% capacity Up to 27.5 hours 3G talk time Up to 21 hours 720p video playback Up to 17 hours Wi-Fi web browsing Power Adapter Output: 9V 2A 18W Operating System Android™ N with new ASUS ZenUI 4.0 ASUS ZenUI 4.0 includes: Launcher Themes ZenUI Safeguard Fingerprint Sensor ZenMotion Gallery SelfieMaster File Manager Weather Game Genie Camera Clock Calculator Mobile Manager Keyboard Phone Contacts Page Marker Always on panel AudioWizard In the Box ZenFone 4 Pro with Android™ N and new ASUS ZenUI 4.0 ASUS ZenEar Pro earphone with microphone Type-C USB cable Ejector pin (SIM tray needle) USB power adapter (18W) Documentation (user guide, warranty card) Clear soft bumper (optional) Note Specifications and contents may vary by region.