YEALINK SIP-T54W IP phones

Yealink SIP-T54W. Product type: IP Phone, Product colour: Black, Handset type: Corded handset. Dual-Tone Multi-Frequency (DTMF) modes: Inband, Out-of band, SIP-info. Line quantity: 10 lines, Phonebook capacity: 1000 entries. Volume control: Buttons. Display: LCD, Display diagonal: 10.9 cm (4.3"), Resolution: 480 x 272 Pixels