Yealink Dual-Band Wi-Fi PhoneYealink T57W Dual Band Wi Fi Desktop IP Phone with Bluetooth, 3 Year warranty and Colour Screen. The Yealink T57W showcases Yealinks next generation of Desktop IP Phones, with a wide range of connectivity methods. The T57W features the same great look and feel that the T5 series devices are known for, as well as a colour screen and industry leading 3 year warranty! Enable connectivity how you prefer, either via normal ethernet or your choice of Wi Fi