Yealink SIP-T54W Features and Specifications: Mid-level phone, ideal for professionals and managers with moderate call load 4.3" 480x272-pixel color display, fully adjustable HD Voice with Yealink Acoustic Shield technology 10 line keys, 16 SIP accounts, 27 memory keys Built-in Bluetooth, Wi-Fi Dual-port Gigabit Ethernet 1xUSB port for call recording and wireless USB headset Power supply sold separately