The Asus Zenfone Max (M1) ZB555KL was announced in 2018, February With 5.5 inches, 88.1 cm2 (~84.4% screen-to-body ratio) IPS LCD, Powered by Qualcomm MSM8917 Snapdragon 425 (28 nm)Qualcomm MSM8937 Snapdragon 430 (28 nm) and running Android 8 (Oreo), ZenUI 5, the device delivered smooth performance and multitasking capabilities. while the Li-Po 4000 mAh, non-removable ensured long-lasting usage.