The Asus ROG Phone II ZS660KL was announced in 2019, July 22 With 6.59 inches, 106.6 cm2 (~80.3% screen-to-body ratio) AMOLED, 1B colors, 120Hz, HDR10, Powered by Qualcomm SM8150 Snapdragon 855+ (7 nm) and running Android 9.0 (Pie), ROG UI, the device delivered smooth performance and multitasking capabilities. while the Li-Po 6000 mAh, non-removable ensured long-lasting usage.