Features: 1.The movement is made of plastic steel, anti?vibration and anti?fall, possess a durable quality. 2.There is a protective cover to protect the pendulum needle and prevent dust from entering the movement. 3.Use the pendulum swing to choose the desireble tempo, allow the pendulum to go into motion, easy to use. 4.Nickel?plated swing rudder,fast speed regulation and down, establish accurate musical timing, help play at a proper pace. 5.Have a classic design of a pyramid style, feature a pendulum in the center that completes this classical look that all musicians love. 6.Applicable for practicing piano, violin, guitar, bass, drum set and other musical instruments, have adjustment range from 40 to 208. 7.Accurate beat, clear scale, adjustable rhythm mode, provide room for you to choose accent according to your practice. specification:Item Type: Mechanical Metronome Shell Material: ABS Movement Material: Plastic Steel PackageList:1 x Mechanical Metronome 1 x Use Manual NoteAccording to the beat speed requirement of each song, move the pendulum to the corresponding speed scale, and pull the accent adjustment key to adjust the accent. For example: 1. Beat speed at 138 : move the metronome's pendulum to the position of the scale of 160 (the pendulum is slower in the upward movement direction, faster in the downward direction) 2. Accent : 4/4 note: when the accent key is pulled to the 4/4 position, it will "ding" every 4 beats to remind you of the accent.