The Cat S61 was announced in 2018, February With 5.2 inches, 74.5 cm2 (~58.6% screen-to-body ratio) IPS LCD, Powered by Qualcomm SDM630 Snapdragon 630 (14 nm) and running Android 8.0 (Oreo), upgradable to Android 9.0 (Pie), the device delivered smooth performance and multitasking capabilities. Its 16 MP, PDAF, FLIR thermal camera (Lepton module) rear camera captured crisp photos and 4K@30fps, 1080p@30fps video, while the Li-Ion 4500 mAh, non-removable ensured long-lasting usage.