396 x 81 pixel-based, anti-glare, monochrome display Supports two lines and offers a full-duplex speakerphone Network features include Cisco Discovery Protocol and IEEE 802.1 p/q tagging and switching. PoE: The phones can receive power from IEEE 802.3af-compliant blades. The display is easy to view and the buttons and keys are easy to use; you can remove the foot stand for wall mounting, with mounting holes located on the base of the phone. The Cisco Unified IP Phone 6921 is also more energy-efficient and eco-friendly, in support of customer green initiatives. A Deep-Sleep option provides energy savings. With this option, the Cisco Unified IP Phone 6921 consumes up to 50 percent less power in off-hours versus when the phone is idle during normal business hours. In addition, reground and recyclable plastics deliver a more earth-responsible solution. The Cisco Unified IP Phone 6921 offers greater personalization. Right-to-left language presentation is also supported on the displays, addressing the language localization needs of global customers. The Cisco Unified IP Phone 6921 supports two lines and offers a full-duplex speakerphone for a more productive, more flexible, and easier-to-use endpoint experience. The Cisco Unified IP Phone 6921 supports single-call per-line appearance, offering traditional telephony-like user experience for customers who seek this type of call interaction for their users. Fixed keys for hold, transfer, and conference; tri-color LED line and feature keys also make the phone simpler and easier to use. The Cisco Unified IP Phone 6921 is an innovative endpoint that delivers affordable, business-grade voice communication services to customers worldwide.
Looking at it in the picture kind of takes the emotion away, since the 790x and 791x both have a better display. The good thing about this one is that it has speaker phone and is a great replacement for the basic phone. The only thing is that its display is so tiny that I'm having problems with some elder people that use them complaining that they can't see who is calling them.