Planet Waves Metronome Tuner.

The Metronome Tuner features and intuitive, easy-to-use multi-funcion metronome along with a precise meter-style chromatic tuner in a pocket-size design. The metronome offers adjustable tempo, beats and time division settings with volume control and 1/8" headphone jack output. The built-in precision tuner features an oversized display with adjustable frequency calibration, built-in condensor microphone and a 1/" input jack for tuning acoustic or electric instruments. The essential, all-in-one practice tool for the beginning to advanced musician!