Cisco 7941 Series Unified VOIP IP Phone - CP-7941G-GE - (Call Manager Required) High-resolution, Graphical 4-bit grayscale display (320 x 222) that supports double-byte characters and Unicode text to benefit extensible markup language (XML) High-quality speakerphone technology, including an easy-to-use speaker on/off button, microphone mute button, and headset button - active when lit A full-featured Handset that provides two programmable line and feature button Supports IEEE 803.af Power over Ethernet (PoE) only does not support Cisco Prestandard inline PoE.(Power Supply not included). Intended for use with Cisco Unified Communications Manager [Call Manager] system.