Buy from Amazon : br br Whistler SWRA-36 Pro-3600 Laser-Radar Detector Antenna Module Accessory br br Provides a secondary antenna to enhance the sensitivity to both radar and laser detection br Designed for rear installation to improve sensitivity from behind a weaker area for most radar detectors br Includes mounting hardware and brackets along with interface cable br Use with LRM-360 Laser Module br Can also be combined with RLC-360 GPS Module