Asus Zenfone Max (M1) ZB555KL comes with Android 7.1 (Nougat) OS, 5.5 inches IPS LCD and 720 x 1440 pixels resolution + 245 ppi density, It has Deepsea Black, Sunlight Gold, Ruby Red colors,Dual SIM Nano-SIM Slot supports 2G, 3G and 4G LTE network.
The smartphone has Dual 13 MP+ 8 MP rear camera having Geo-tagging, touch focus, Face Beauty, Burst Mode, HDR, Smile detection, face detection, panorama features and 8MP front camera.
Asus Zenfone Max (M1) ZB555KL has Quad-core 1.4 GHz Cortex-A53 or Octa-core 1.4 GHz Cortex-A53 processor, Qualcomm MSM8917 Snapdragon 425 or Qualcomm MSM8937 Snapdragon 430 chipset and Adreno 308 or Adreno 505 GPU.
It has 32 GB, 3 GB RAM or 16/32 GB, 2 GB RAM and support 256GB Micro SD card. It brings Bluetooth 4.0, A2DP, LE + microUSB 2.0, USB On-The-Go and 3.5mm jack.
Here is 4000 mAh battery but no fast charging and wireless charger support.
The smartphone has Fingerprint, accelerometer, proximity, compass Sensors.