The Seiko Quartz Guitar Tuner Model ST600 is a vintage metronome unit designed for various types of guitars including acoustic, electric, and classical. This compact and lightweight tuner features a black plastic construction with a built-in microphone, jack input, and headphone jack for easy use. With its auto power-off function and reliable performance, this Seiko tuner is a practical and stylish accessory for musicians looking to ensure their guitars are always in tune. Made in China, this product is a versatile tool for both beginners and seasoned players.