We have not yet integrated a geolocation function into the filter, so working with maps can be very complex and difficult to achieve. Other users have done it, but it very much depends on the map plugin you are using. It is not something we support at this time.

You would need custom CSS to make the boxes wider, like this:

#search-filter-form-1615 .sf-range-max, #search-filter-form-1615 .sf-range-min {
    max-width: 200px;
}