Features: mini digital , universal for all instruments that need beat or tempo. Built-in TAP function. 0~9 beat, multiple , 30 to 280bpm tempo. Clear LCD display and indicator light, with "select" & "up" or "down" adjuster. With 3.5mm stereo earphone , powered by 1 * 2032 cell battery(not included). Product Description: Specifications: Material: Plastic Color: Black Earphone Dimension: 3.5mm Tempo Range: 30280 Bpm Beat: 09 Accuracy: +-0.001 Power Supply: 1 * 3V(2032) Battery(Not Included) Item Size: 5.5 * 3.3 * 2cm / 2.2 * 1.3 * 0.8in Item Weight: 18g / 0.6oz Package Size: 12 * 8 * 3cm / 4.7 * 3.2 * 1.2in Package Weight: 27g / 1oz Package List: 1 * 1 * User's Manual(Chinese / English) Note: The guitar is not included. The battery is not included. High-quality material with good durability, able to withstand daily use and long time wear and tear. Comfortable and pleasant to use experience, giving you a kind and warm feeling. Aesthetically pleasing and complements your home style, enhances the visual effect of the space and creates a cosy and welcoming atmosphere. Wide range of uses to meet your needs and lifestyle. Good quality and inexpensive, perfect for gifting to friends and family.