Designed in conjunction with Ned Steinberger, the Planet Waves NS Mini Headstock Tuner precisely tunes a wide variety of stringed instruments in a compact, lightweight, and easy-to-use design. The highly sensitive piezo transducer and backlit display allow for smooth and highly accurate tuning in noisy, dim or well-lit environments, where other tuners fail. The miniscule design allows the tuner to hide effortlessly behind the headstock, concealing it from your audience and allowing it to remain mounted on the guitar inside most cases. Featuring a 360 degree swivel mechanism and adjustable padded clamp, the NS Mini offers optimal viewing angles and maximum positioning flexibility. As a result, the NS Mini is equally at home on left and right-handed instruments as well as on small and large headstocks, making it the ideal choice for the widest variety of players and instruments. The NS Mini also features an easy-to-read color changing backlit display which is powered by a readily available CR2032 battery (included). Maximum battery life is provided by the auto-off function, shutting the tuner off automatically after several minutes of no signal. Powered by the latest version of the highly praised and super accurate Planet Waves Headstock tuner software, the NS Mini also offers adjustable calibration between 430 Hz and 450 Hz for use in a wide variety of playing situations. Enjoy effortless and inconspicuous tuning at a great value with the NS Mini Headstock Tuner.