Beelink SEA I TV Box with Realtek 1295 DD Quad-Core ARM Cortex-A53 CPU has two Ports one is a Standard USB 3.0 Port and the other is a Standard USB 2.0 Port which has a better transferring speed much fasterer than before two Standard USB 2.0 Ports.</br>Beelink SEA I TV Box has a HDMI IN Type Port and HDMI OUT Type Port whose functions of HDMI IN and Picture in picture are excellent. That is to say one screen can display different contents you don't need to switch different HDMI cables if you want to read different messages which both save your time and aviod any troubles.</br>Beelink SEA I has a removable hard disk box which supprts SATA III (1.5G/3G/6G) what's more hard disk thickness supports 9.5MM and 7.5MM. It is simple stable and easy to use. Tips: the device is in working condition please do not insert or remove the hard disk.</br>When the mainstream set-top boxes still stuck in DDR3. Beelink set-top boxes have been upgraded to faster DDR 4 by increasing the read- write rate to 2133 MHz to 15% faster frequency increase open or use applications more quickly. Moreover SEA I support Gigabit Ethernet?? Dual-band Wifi?? 802.11 as protocol.</br>Beelink SEA I