Note: School Accessory Kits are delivered to your child's school.Clip-on tuner for all instruments. Fully chromatic, tunes to key of C, Bb, F, Eb, D. Has a built-in microphone or vibration only pickup with unique vibratory ring. Has a meter and a display that turns green when note is played in tune. Pitch calibration range of 410-489 Hz. Comes with battery and 1 year manufacturer's warranty.