The OPPO K9x was announced in 2021, December 23 With 6.49 inches, 102.2 cm2 (~84.2% screen-to-body ratio) IPS LCD, 90Hz, 480 nits (typ), 600 nits (HBM), Powered by MediaTek MT6833P Dimensity 810 (6 nm) and running Android 11, ColorOS 11.1, the device delivered smooth performance and multitasking capabilities. while the Li-Po 5000 mAh, non-removable ensured long-lasting usage.