Looking for precision tuning on the go This used Roadie Tuner RD300, in great condition, offers fast and accurate automatic tuning for guitars, basses, ukuleles, and more. The RD300 works seamlessly with the free Roadie mobile app via Bluetooth and features a built-in motor to adjust each tuning peg for perfect pitch. With a vibration sensor for noise-free use, a bright OLED display, and a long-lasting rechargeable battery, it's an ideal tool for musicians of all levels. Compatible with standard guitar tunings and custom setups, the RD300 delivers convenience and consistency in a powerful handheld device.