Notice:NOT SUPPORT registration of SIP account to VoIP system. The MP45 compatible with Microsoft Teams and Skype for Business and most UC applications.,Plug and Play. As a USB phone, you can simply connect the MP45 to any PC. It will be automatically recognized and instantly ready to start placing or receiving phone calls, giving you a trouble-free plug-and-play experience.,Superior Voice Quality. Yealink MP45 delivers remarkable high-definition audio quality for the ultimate voice communications experience. With its sleek, high-quality handset and full duplex, hands-free speakerphone, the MP45 enables crystal-clear, natural conversations without echoes or feedback.,Excellent User Experience. Yealink MP45 has an efficient 4.0-inch capacitive touch screen, classic handset and hard dial pad. Since to Yealink Optima HD voice, and the hardware of a full-duplex hands free speakerphone with AEC and HAC handset, MP45 can deliver a crystal-clear voice communications experience.,Easy to Use. MP45 supports Yealink USB Connect deployment for easy management and upgrade. Compared with Android Phone, there will be less work for admin to do the maintenance. The MP45 compatible with Microsoft Teams and Skype for Business and most UC applications, is intuitive and easy to use.