KORG Chromatic Tuner with Needle for Wind Brass and Supports Any Concert 100 Hours of Continuous Soft Case Included OT-120 Meter, Bands, Bands,

Batteries: 2 AAA batteries (included) Battery type: Alkaline A vertical chromatic tuner with a needle meter that provides excellent visibility. It also supports a wide range of transposing instruments and classical temperaments. Long-life design allows for extended use.