The Apple iPad Pro 4 12.9" was announced in 2020, March 18 With 12.9 inches, 515.3 cm2 (~85.4% screen-to-body ratio) IPS LCD, 120Hz, 600 nits (typ), Powered by Apple A12Z Bionic and running iPadOS 13.4, up to iPadOS 15.5, planned upgrade to iPadOS 16, the device delivered smooth performance and multitasking capabilities. while the Li-Po 9720 mAh, non-removable (36.71 Wh) ensured long-lasting usage.