The PicoAPRS 1-watt APRS Tracker with built-in TNC was developed by Taner Schenker (DB1NTO). Since it has a built-in TNC, there is no need for external devices, such as an Android unit running APRSDroid, or some other tracking program. This unit is completely stand-alone. A standard female-SMA connector on top of the unit allows for easy external antenna connecting.
Available from Ham Radio Outlet