Asus Zenfone 4 Max ZC520KL official Pictures. Asus Zenfone 4 Max ZC520KL is a Smartphone of asus. The Asus Zenfone 4 Max ZC520KL Android Smartphone. Announced Aug 2017. Features 5.2″ Display, Snapdragon 425 Chipset, Dual: 13 MP (AF) + 5 MP Primary Camera, 8 MP Front Camera, 4100 MAh Battery, 32 GB Storage, 3 GB RAM. Asus Zenfone 4 Max ZC520KL price starts.