The C450HD IP phone from AudioCodes is a feature-rich high-end business phone with support for Microsoft Teams and Skype for Business (SfB). Large 12.7 cm (5") touchscreen (1280 x 720), Optional colour touchscreen expansion modules 2 x Ethernet 10/100/1000 ports, PoE or external AC adapter, With dual GbE support, with integrated Bluetooth and Dual Band Wi-Fi.