Feature: This product is a SDI (Serial Digital Interface) switcher,it can switch 2 or 4 channels of SDI signal to a SDI signal,and it support Full-HD SDI signal input and output,it also very easy to be use with high stability and reliability.And it is widely used at all the TV station and other work place,safe security monitoring,training venue and so on. Specification: SDI input resolution: 480i@60Hz/576i@50Hz/720@50Hz/720P@60Hz/1080i@50Hz/1080i@60HZ/1080P@24@25@30@50@60Hz/ SDI output resolution: 480i@60Hz/576i@50Hz/720P@50Hz/720P@60Hz/1080i@50Hz/1080i@60Hz/1080p@24@25@30@50@60Hz SDI signal output range:800mVp-p Package Contents: 1x SDI 4x1 Switch . 1xUS Power adapter. 1x User manua .