The Yamaha YT-240 Tuner is a black auto tuner designed specifically for violin, viola, cello, and bass instruments. With its high-quality Yamaha brand and compatibility with various stringed instruments, this tuner provides accurate and efficient tuning for musicians looking to achieve optimal sound quality. Perfect for both beginners and experienced players, the Yamaha YT-240 Tuner offers a convenient and reliable tool for achieving perfect pitch during performances. This is a vintage, new old stock tuner. Battery is included and sealed, but tuner is untested with this battery.