Yamaha YT-2200 is a chromatic tuner that can be used to tune a variety of instruments, both electric and acoustic. It features an auto-tuning mode that automatically selects the note closest to the tone input, making it convenient for tuning during musical performances. The tuner also includes a built-in microphone for tuning acoustic instruments, and a standard A4 pitch selection. With its compact size and easy-to-use interface, the Yamaha YT-2200 is a great choice for musicians of all levels.