dear Electronic Digital Metronome with 2.2-inch LCD Universal Electronic Metronome with Tempo Beat Speed Control Human Voice On/Off Built-in Rechargeable Battery for Guitar Piano Violin Drum Features: electronic metronome provides beat type adjustment (0-9), tempo control (40-208 /minute), human voice on/off. Digital display for easy reading, 2.2-inch large LCD screen is clear to read data at a glance. Built-in 1300mAh rechargeable battery powered, more humanized and environmentally friendly. Easy to use via control buttons, compact and lightweight, convenient to carry. With earphone jack for silent use, not disturbing others. Supports adjustment through thumbwheel. metronome will automatically power off if not in use for 3 minutes. With a folding support stand on back, it is easy to stand on flat. A reliable practice partner for lovers who play guitar, piano, violin, drum, guzheng and more. Specifications: Material: ABS Tempo : 40-208bpm Beat: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 Preset: Tempo=120, beat=4 Auto off: 3 minutes Power Supply: 3.7V 1300mAh rechargeable Li battery Item Size: 150 * 64 * 25mm / 5.91 * 2.52 * 0.98in Item Weight: 135g / 4.78oz Package Weight: 171g / 6.03oz Package Size: 18.5 * 70 * 40cm / 7.28 * 2.76 * 1.57in Package List: 1 * Metronome 1 * Type-C Cable 1 * Manual (English)