With faster response to the phones user interface and better device performance, the SIP-T27G , as the upgraded product of T27P, is Yealinks latest feature-rich tool unifying superior voice capabilities and increased function extension capability for business. Yealink Optima HD technology delivers superb sound quality and brings you a life-like voice communications. With an all-new USB port, the SIP-T27G boasts unparalleled functionality and expansibility with Bluetooth, Wi-Fi, and USB recording features. Seamlessly migrated to GigE-based network infrastructure, the SIP-T27G IP Phone is also built with the Gigabit Ethernet facilitating very rapidly call handling. By using standard encryption protocols, the SIP-T27G performs highly secure remote provisioning and software upgrades.