The electronic metronome points electronic display, beat speed control, volume control, battery or USB powered, non-slip backside and extra functions It's a competent train accomplice for track fanatics who play guitar, piano, drum, guzheng and extra Features: The electronic metronome provides beat variety (0 to 9), beat velocity control (40-208 beats/min), digital and human voice, timer (15/ 30/ 45/ 60min) Digital exhibit for straightforward reading, clear at a glance three AAA batteries (not included) or Type-C USB cable powered, more humanized Easy to apply by way of the management buttons and a massive turntable; compact and lightweight, convenient to hold With earphone jack for silent use, no longer aggravating others; supports volume adjustment throughout the thumbwheel A reliable practice partner for track enthusiasts who play guitar, piano, violin, drum, guzheng and extra Wonderful reward desire Note: 1 Please remove the batteries if you wish to use USB cable to power it 2 Size and coloration could also be slightly diverse due to guide dimension and diversified mild circumstances Thanks for understanding Specifications: Color: Black/ White/ Light Blue/ Light Purple (Optional) Material: Plastic Beat: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 Tempo: 40-208 Beats/minute Voice: Electronic Voice, Human Voice Timer: 15min, 30min, 45min, 60min Power Supply: 3 * AAA (not included) or Type-C USB Powered Item Size: a hundred and forty * 70 * 45mm / five * 2 * 1 Item Weight (without battery): 130g / 4 Package Size: 14 * eight * 5cm / five * three * 1 Package Weight: 175g / 6 Package List: 1 * Electronic Metronome 1 * USB Cable (Type-C) 1 * User Manual (English)