The Kestrel meter is the must have device for precision and long range shooters. If you have been looking for an all in one weather meter, wind analyzer and predictive ballistic application your search is over. The Kestrel 5500 provides you with more functionality and improved environmental features over previous models. This particular model includes Bluetooth Link which allows you to connect to PC's/Mac's via a dongle or to a smartphone android or IOS device. Additionally this unit includes the vane mount.