System: Android 7.0 with ASUS ZenUI
Processor: 2.2 GHz / Octa Core / Qualcomm Snapdragon 630 / GPU: Adreno 508
Memory: ROM: 64 GB / RAM: 4 GB or 6 GB / Slot type: microSD / Max. slot capacity: 2 TB
Display: 5.5" / IPS display / Resolution: 1920 x 1080 pixels
Camera:

Main/Rear: 12 MP, Wide: 8 MP / Sony IMX362 / f/1.8, 1.4μm / Dual Pixel PDAF / OIS/ EIS

Video: 4K UHD

Front: 8 MP

Network: 4G: LTE Band 1/2/3/5/7/8/18/19/28/38/39/40/41 / 3G: 800/850/900/1800/1900/2100 MHz / GSM: 850/900/1800/1900 MHz
SIM card: Type: nano-SIM / Slot: Hybrid dual SIM (Optional: microSD)
Wireless: Bluetooth: 5.0 / Wi-Fi: 802.11 a/b/g/n/ac / NFC
Connection: Jack 3.5 mm / USB Type-C
Location: GPS, aGPS, GLONASS, BeiDou
Sensors: Ambient light sensor, Digital Compass, Fingerprint, G-sensor, Gyroscope, Hall sensor, Proximity sensor, RGB sensor
Battery: 3300 mAh (Built-in) / BoostMaster Fast Charging
Weight: 165 g
Dimensions: 155.4 x 75.2 x 7.5 mm
In the box: ASUS ZenFone 4 ZE554KL, ASUS earphone with Mic, USB Type C Cable, Bumper, USB Power Adapter, Documentation