The ts 253b comes with a sleek new look featuring an oled panel and two capacitive touch buttons the ts 253b also features a pcie port for boosting the potential applications of your nas the qnap qm2 expansion card can be installed for adding an m2 ssd cache10gbe connectivity a compatible wireless card can be installed to use the ts 253b as a wireless access point and a usb 31 10gbps card can be added for easier backup tofrom multiple external storage devices with a usb type c quickacc