markerDefaults.tooltip.callout Boolean(default:true)

Specifies if the tooltip callout will be displayed.

Example - hide the tooltip callout

<div id="map"></div>
<script>
    $("#map").kendoMap({
        layers: [{
            type: "tile",
            urlTemplate: "http://a.tile.openstreetmap.org/#= zoom #/#= x #/#= y #.png",
            attribution: "&copy; OpenStreetMap"
        }],
        markerDefaults: {
            tooltip: {
                callout: false,
                template: "Lon:#= location.lng #, Lat:#= location.lat #"
            }
        },
        markers: [{
            location: [42, 27]
        }, {
            location: [40, 20]
        }]
    });
</script>