I own a Freed Hybrid GB7 and purchased a TV canceler, but I accidentally bought two. I'm selling one because I don't need it. I bought this for a GB7, but it's also compatible with: DBA-GB5, GB6, GB7, GB8 models released after September 2016. It allows you to watch TV and DVDs, and operate the navigation system while driving. There are no instructions included, but you should be able to install it by watching videos on YouTube, etc. Thank you for looking.