On offer is a surf 4 watt unit for use with the Clansman PRC351 radio set. The SURF is used when more than one radio is used close to each other and prevents one radio interfering with the other radio. This comes with the small connection lead.Please note this is a mutiple item listing picture so yours may differ slightly. Only at this price for a limited time as I am in need of some space. Please look at my other items as I do have more Clansman gear.