Product name:digital metronome Product Size about:5.5*3.3*2cm/2.1*1.2*0.7in Product color: As shown in the figure Earphone Jack Dimension: 3.5mm Tempo : 30~280 Bpm : 0~9 Accuracy: +-0.001 : 1 * 3V(2032) (Not Included) Product Material: plastic product features: 1. Suitable for a variety of instruments: Suitable for guitar, ukulele, violin, or piano and other instruments. 2. Clear display: Clear LCD display and indicator light, with "Select" and "Up" or "Down" regulator to adjust the rhythm type, tempo, etc. 0~9, multiple rhythms, 30 to 280bpm rhythm. Built-in TAP function allows you to test rhythm and melody rhythm. 3. Headphone jack design: With a 3.5mm stereo headphone jack, powered by 1 * 2032 battery (not included). 4. Easy to carry: Designed with a small clip and lanyard hole, this design allows the metronome to be clipped on clothes for easy carrying and fixing. 5. Gift: This metronome is very suitable for your band friends to use, and the compact body and multiple functions are the best witnesses. Precautions: 1. As we all know , the different computers display colors differently, the color of the actual item may vary slightly from the following images. 2. If you feel difficult to choose the size, you can feel free to contact mewe will give you some suggestion, but it is for you reference only. Shipment includes: 1 pc digital metronome