Electronic metronome, a must for playing musical instruments.A of rhythms are adjustable, and portable.The operation is simple, and shouts.Clear and clear, beautiful designPrecise rhythm device for piano, guitar and violin grading testName:electronic-beat piano grading children's mini metronomeType:musical instrument accessoriesWeight:about 152gColour:BlackMaterial:ABS+electronic componentsSize:14x7x4cmPackage Contents:1 * metronome1 * USB cable1 * Chinese and English instructionsOnly the above package content, other products are not included.Note: Light reflection 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.