NEUMA Clip On Guitar Tuner Features Small size but with Large bright LCD screen, easy read and adjust Only one button control everything, easy to operate All around viewing angle with 360 degree turning around head Auto off if you do not use for over 5 minutes to save energy Perfect for string instruments like acoustic/classical/electric guitar, bass, violin , ukulele,mandolin,banjo Specifications – Tuning range: A0(27.5Hz)~C8(4186Hz) – Tuning scale: Chromatic, Guitar, Bass, Violin, Ukulele – Precision: ±1Cent – A4: 430Hz- 450Hz – Power Supply: 3V(CR2032 lithium battery ) – Dimensions: 34(W)x37(D)x48(H)mm – Weight: 0.06 lb Package include 1 * NCT-10 Tuner 1 * User manual 1 * Coin battery