This belonged to my daughter, but she no longer needs it as she's retired. The contact microphone was a spare and hasn't actually been used. I'm selling them as a set. KORG TM-50 Combo Tuner Metronome Useful for practice, it can be used as a tuner and a metronome. Uses 2 AAA batteries (not included). There are some minor scratches, but it works perfectly fine. I've confirmed it's working before listing. KORG CM-300 Contact Microphone Brand: KORG Model Name: CM-300 Type: Contact Microphone Color: Black This is practically unused, only opened. I'd like to sell it to someone who likes it and will use it. Thank you.