StarTech.com 4-Port Multi Monitor Adapter - Mini DisplayPort to DisplayPort MST Hub - 4x 1080p - Video Splitter for Extended Desktop Mode on Windows PCs Only - mDP to Quad DP Monitors. Video port type: Mini DisplayPort, Video out: 4x DisplayPort. Maximum resolution: 3840 x 2160 pixels, Product colour: Black, Maximum refresh rate: 30 Hz. AC input voltage: 100 - 240 V, Input current: 0.5 A, Output voltage: 5 V. Width: 65 mm, Depth: 386 mm, Height: 15 mm. Package width: 153 mm, Package depth: 244 mm, Package height: 64 mm