Musedo Metronome Tuner, Rechargeable 3 in 1 Digital Metronome Tuner Tone Generator for Ruan Yangqin Erhu in Guzheng3 in 1 Device: Metronome Tuner combines Tuner, Metronome and Tone Generator, all housed in a pocket device. It can be used for your gig or practice. Designed for beginners and professionals, with a strong and durable design, this tuner is built to last. Rechargeable Lithium Battery: Metronome tuner built-in rechargeable lithium cell, supports long time use and saves you the trouble of replacing batteries frequently. Suitable for Matouqin, Guzheng, Zhongruan, Liuqin, Yangqin, Banhu, Pipa, Jinghu, Erhu, Guqin, Chinese folk musicSize: 15x5x3cmMaterial: ABS + ElectronicsColor: WhitePackage Contents:1 * Tuner1 * Receiving1 * USB Data CableOnly 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 error is +/- 1-3cm.