The versatile Planet Waves Multi-Function Chromatic Tuner is packed with options and features , allowing you to accurately tune virtually any instrument in any environment. The unique, patent-pending rotary user-interface enables the tuner to operate in sweep or strobe modes. The tuner includes standard 1/4 inch input and output jacks and a sensitive condenser microphone. The bracket/clip accessory has a built-in piezo sensor allowing you to hang the tuner on a sound hole, clip it on a bridge orheadstock for use in high ambient-noise areas or for silent tuning with electric instruments.