The versatile Planet Waves CT-02 Multi-Function Chromatic Tuner is packed with options and features that allow you to accurately tune virtually any instrument, in any environment. The unique, patent-pending rotary user-interface enables the tuner tooperate in sweep or strobe modes. The tuner itself includes standard 1/4 inch input and output jacks and a sensitive condenser microphone. The bracket-clip accessory has a built-in piezo sensor which allows you to hang the tuner on the sound hole or clip it on a bridge or headstock for use in high ambient-noise areas or for silent tuning with electric instruments.