I purchased a TSD700L from Xtrons in 2021 and installed it in my Land Rover Defender. The reverse camera and dash-cam work great, and the audio quality through my cheap speakers is good. BUT THE RADIO WILL NOT STAY TUNED. Using my wing-mounted aerial for FM reception, the unit will not stay on the frequency for a station more than a few minutes, before it seeks another frequency. Just last week I got a Xtrons RANT01 windscreen mounted aerial hoping it would be more compatible but that does not seem to have improved things. It seems that either the quality is not what I hoped for, or I have a defective product