Large Braille Keys - Each numeric key is equipped with an oversized Braille design key to meet the needs of special groups. Virtual Programmable Keys - Supports custom configuration of 4 DSS keys, can display 4 pages, with each page set to show the status of the DSS key. High-Resolution, Loud Voice Output - Supports G.722, Opus, and other voice codecs and can handle a variety of audio applications. The volume is higher than that of conventional phones, catering to the hearing needs of older adults. Supports 2.4 GHz and 5 GHz dual-band WiFi as well as Bluetooth 4.2 and offers a receiving function for the 433 MHz band. Gigabit Ethernet - Adaptive 10/100/1000 Mbps network ports that provide high-speed network transport and support PoE power supply.