Built with live performance reliability and aesthetic in mind, the Bullet Tuner provides a nonintrusive, staunchly accurate tool for musicians at every stage. A powerful engine with a noise-proof vibration sensor allows for precise chromatic tuning for electric, acoustic and bass guitar players alike—while a bright, color LED screen shows easy-to-see readings in any environment. Battery powered.. 1.5V (LR44) alkaline batteries (2)(included) • MFSKU 0239979002 • UPC 885978033423