PRO-REP-103 A new and improved flexible cardioid microphone and microphone bass extension/roll-off switch are the latest updates to this popular active soundhole pickup. The easily accessible Mic/Pickup Blend control offers just the right blend at your fingertips. For unequaled sound quality and ease of use, it’s hard to beat the performance of the Rare Earth Mic Blend. Warm and full humbucking sound Flexible cardioid microphone and mic/pickup blend control Microphone bass extension/roll-off switch Active electronics and neodymium magnet structure for exceptional string balance and clarity Pre-wired output jack can also be permanently installed Easy installation with no alteration Miniature batteries (included) offer 100 hours of life