Features: 1.Made of durable material,anti-corrosion and wear resistance. 2.Adopting pyramid shape and rigorous design style,beautiful and practical 3.Help children develop speed concept.Help us to play music with more smooth and steady rhythm 4.Help us to for focus on, improve the practice efficiency 5.Precision spring mechanism Notice: Actual color may be slightly different from the image due to different monitor and light effect Please allow 1-3cm deviation due to manual measurement Specification: Name:Guitar Metronome Material: Plastics,Metals Product size: about 21x11.5x11.5 cm