Sonic Research Turbo Tuner Model ST-200 Stomp Box Strobe tuner and Clip On Contact Mic This combo comes with Turbo Tuner ST-200 and Flanger FA-01 Clip-on contact microphone Turbo Tuner ST-200 : True Strobe Display Turbo Tuner ST-200 :True Bypass / Muted Output and Extreme Accuracy Turbo Tuner ST-200 : Permits tuning to any of the 12 notes from C0 to C8, in any temperament. Flanger FA-01 Clip-on Microphone for tuner is a compact clip microphone for tuning acoustic guitar, wind instruments.