Seymour Duncan Secret Agent Neck Single-Coil Pickup – Medium Output CeramicThe Secret Agent, a neck single coil that resides under the pickguard, stealthy, hidden from sight. (Get it?) Seymour went with a medium output ceramic bar magnet to help the Secret Agent accomplish its mission. Because its further from the strings with less magnetic pull, this design provides a full, warm, almost jazzy neck pickup tone, which perfectly complements the Esquire bridge models bark and snarl.