as 1080i or 4K ( mainly versions with Blu-ray) video resolution upscaling, a 5-disc platter, HDMI inputs, USB connectivity, Bluetooth support, Wi-fi support, Internet apps, DAB and DAB+, mirroring possibility, iPod dock and a hard disk for recording TV shows. Some older HTIBs from the 1990s had a built-in VCR, besides a DVD, along with a TV tuner, and a hard disk for recording TV shows. Audio electronics Bundled products or services Consumer electronics Entertainment Home video Marketing techniques Surround sound