The Cisco Unified Wireless IP Phone 7921G supports a host of calling features and voice-quality enhancements, including: IEEE 802.11a, b, and g standards; A larger (2-inch) color display (176 X 220 TFT); Speakerphone capabilities; Dedicated keys for push-to-talk, mute, and volume; Longer battery life (90 hours standby time). An intelligent wireless infrastructure can help you extend advanced voice and unified communications capabilities across your enterprise. As an integral component of the Cisco Unified Communications Wireless solution, the Cisco Unified Wireless IP Phone 7921G transparently delivers intelligent services such as security, mobility, quality of service (QoS), and management throughout an end-to-end Cisco network.