We have developed an online garden check tool that could help you to check your garden in advance so that you would know if Navimow is a good fit for your garden. Please check it here: https://navimow.segway.com/CheckList
You can bring the checklist result to your local dealers for more professional purchase advice.
Regarding the recommended purchase model or accessories such as an antenna extension kit, please consult your local dealer stores. They will offer you the best purchase advice based on your specific garden conditions.