Portable piezo pickup with volume control. AP-2 is ideal for acoustic musicians looking for an easy, effective solution to amplifiy their instruments and control volume from the stage. A handsome wooden casing houses both the passive piezo sensor and a high quality volume potentiometer. Attaches safely with enough PowerTack adhesive for multiple applications, while a detachable 1/8" to 1/4" cable allows the pickup to remain in place during storage.