Features: It can divide a complete HD, DVI 1080P image signal into 4 blocks and assign to 4 video display units, to form a large dynamic image screen. Support HD and DVI input, support 4-channel HD output. The HD resolution up to 1920*1080, bringing clear and vivid images. Support multiple screen splicing modes, including 4x1, 3x1, 2x2, 2x1, 1x4, 1x3, 1x2, 1x1. Support remote control, background software(RS232)control. Support input switching, brightness adjustment, contrast adjustment, mode selection and other settings. Plug and play, no driver required, easy to operate. Specification: Type: 2x2 video wall controller HD resolution: Up to 1920*1080, 60Hz Input interface: 1*HD, 1*DVI Output interface: 4*HD Support audio format: Stereo Max working current: 300mA Item size: 12.1 * 11.9 * 1.9cm /4.76 * 4.69 * 0.75in Item weight: Approx. 228g /8.04oz Packing list: 1 * Video wall controller 1 * Power adapter 1 * Remote control 1 * RS232 cable 1 * User manual