Yeastar P570. Product type: IP PBX (private & packet-switched) system, Number of users: 500 user(s), Product colour: Black. Ethernet LAN interface type: Gigabit Ethernet. Storage media: HDD. AC input voltage: 100 - 240 V, AC input frequency: 50/60 Hz. Rack capacity: 1U, Width: 252 mm, Depth: 440 mm