Display: 4-inch capacitive touch screen, USB: 3-ports USB 3.0 Hub, Sound: Optimal HD Audio, Keys: Dedicated Teams Button, Product Dimenstions: 223 x 159 x 127 mm, Product Weight: 0.92 kg (2.03 lbs), Warranty: 01 Year Limited Warranty. Working as a peripheral of computer or mobile phone, the MP50 is ideally designed for daily desktop office and hot-desking by offering softphone users familiar telephonic experience with user-friendly UI and premium audio performance.