Hi Brooke, It is a Trimble PN/25045-10, also known as a Trimble Bullet II HE. It has a 35db preamplifier built in. -Chuck Harris Brooke Clarke wrote: > Hi Chuck: > > Can you tell me the model number of that antenna? > > Have Fun, > > Brooke Clarke > http://www.PRC68.com > http://www.End2PartyGovernment.com/