Musedo Metronome Tuner, Rechargeable 3 In 1 Digital Metronome Tuner Tone Generator For Ruan Yangqin Erhu In Guzheng 3 in 1 Device: The metronome tuner combines a Tuner, a Metronome, and a Tone Generator, all housed in a pocket-sized device. Can be used for your gig or practice. Designed for beginners and professionals, with a strong and durable design, this tuner was built to last. Rechargeable Lithium Battery:The metronome tuner built-in rechargeable lithium cell, supports long time use and saving you the trouble of replacing batteries frequently. Suitable for Matouqin, Guzheng, Zhongruan, Liuqin, Yangqin, Banhu, Pipa, Jinghu, Erhu, Guqin, Chinese folk music size:15x5x3cm Material:ABS+Electronics colour:White Package Contents: 1 * Tuner 1 * pickup 1 * USB data cable Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.