TCL 50C645K 50" QLED Android TV. TCL 50C645K 50" 4K HDR ANDROID SMART TV. Freeview Play. AiPQ Engine 3.0 enabled TCL algorithm processes contents with stable and high-quality 4K. 4K HDR PRO. It's more than just natural colours, brightness, and darkness; all you see is what the content developer intended when they created it.