SiRF Star IV</br>Built-In GPS Patch Antenna</br>Built-In Roof Mount Magnet</br>Serial Port Interface.Slim Profile Housing</br>Compatible with most NMEA compliant software. If using on a Laptop?? you'll need the USB Cable Set</br></br>Product Description</br></br>The BR-355-S4 GPS Receiver can be utilized in a variety of applications which require GPS signals to be received and decoded in your Windows laptop or tablet PC?? and for Mac users?? their Mac Books or Mac Book Pro's. Compatible with most all NMEA compliant third-party software?? the BR-355-S4 is suitable for use in vehicle?? marine and aviation navigation?? as well as commercial and municipality applications such as fire trucks?? police cars?? bu