Standard digital proprietary telephone, with 1 line back-lit display, 8 programmable keys and full duplex speakerphone. Pure performance – Attractive design: Panasonic offers a wide line-up of Digital terminals with an ergonomic design for all use. The KX-DT500 Series Digital Proprietary telephones take you to a new dimension in audio experience through excellent Voice quality audio on every phone, combined with easy access to powerful supportive features and applications. The sleek, ultra-modern design, available in both black and white colour options, works well with any office decor. Packed with a host of features, the KX-DT521 Digital Proprietary telephone could not be simpler to use. The KX-DT221 is intuitive, user friendly and follows universal design philosophy making it highly appealing and comfortable to use by all system telephone users.