WxWorx Portable Bluetooth Receiver: The WxWorx receiver is designed to decode XM WX Satellite Weather data and send it to your display device via wireless Bluetooth technology. Portable and unobtrusive, the receiver takes up hardly any space in your cockpit and can be easily moved from one plane to another. Equipped with advanced digital technology developed by XM Satellite Radio, it's a flexible gateway to the XM WX data stream. The XM receiver itself does not need to be on the windscreen or even have a view of the sky. It can be mounted or placed under a seat, in a map pocket, or somehwere else in the cockpit that is out of the way. Only a small 1" square antenna (included) needs to have a view out a window. XM Weather Data Subscription required for use of XM Weather.