Meideal Mini LCD Digital M50 Metronome Beat Tempo Guitar Music Accessory with Battery(Blue) Features: Clip and lanyard hole design, easy and convenient to carry and fix. The product is designed with double channel headphone output. Use this metronome to mark time by the means of regularly recurring ticks or flashes at adjustable intervals. Tap function enables you to test your ideal tempo or tempo of a track. Multi-functional, can be used for all types of instruments. Specifications: Brand: Meideal Condition: Material: Metal+Plastic Weight: Approx. 34g / 1.2oz Size: Approx. 6 * 3.5cm / 2.4 * 1.4in Optional Color: Blue, Yellow, Red, Black, White Tempo: 30 to 280 BPM Beat Value: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 Volume Adjustment: Maximum Volume; Medium Volume; Minimum Volume; Mute Accuracy: ±1/1000 Power Supply: 1 * 3V Cell Battery(Included)   Package list:  1 * Metronome  1 * Battery 1 * User Manual