Roku Express 4K+ Tech specs HDR10/10+, HDR 4K, 1080p, 720p up to 60fps, Quad-core processor, 802.11ac dual-band Wi-Fi. Brillian 4K picture quality : Stream in HD, 4K, and HDR with sharp resolution and vivid color optimized for your TV. Smooth wireless streaming: Nor featuring dual-band wireless, enjoy a smooth streaming experience with faster wireless performance, even with multiple devices connected to your network. -- Amazon