Features: *Brand new and high quality. *The mechanical metronome establishes accurate music timing, helps the player to perform at an appropriate rhythm, provides an accurate sense of rhythm, enhances the agility and accuracy of the fingers, and is suitable for music lovers, beginners or musicians of any age or experience. *Optional beats per second: Using our mechanical metronome, our pendulum can reach 40 to 208 beats per minute. The beat selection is 0, 2, 3, 4, 6. *Without battery, the average wind speed of 20 minutes can prolong practice time and reduce frustration; steel gear can improve durability. *Easy to use: Our mechanical metronome just needs to be tightened! You can then use the pendulum to select the desired beat and rhythm and move the pendulum. *The mechanical metronome is a spring structure, which has the power required to produce a regular beat. *Dust cover: keep clean, push down, open the front cover, push up, lock the cover *Beat adjustment: the accent lever can adjust the beat type. *Metal scale: push the slider up and down to adjust the speed, upward is slow, downward is fast *Powerful, convenient operation, recommended to learn piano. Specifications: Material: PC, Iron plate, Copper Color: Black/Red/PINK/PURPLE/WHITE/BLUE A Size: 203*121*95mm/8*4.76*3.74'' B Size:210*110*95mm/8.3*4.33*3.74'' A weight: 450g B weight: 395g Package includes: 1*Metronome (As Picture Show) Note: Please be sure to verify the size before you order the item. Please refer to the measurement. Tiny measuring error is allowable in normal range. There might be a little color difference due to the monitor, camera or other factors, please refer to the physical item.