Description: Product Name: Violin Tuner Tuning mode: twelve equal temperament, violin (V mode) Pickup method: vibration pickup Pickup range: A0 (27.50Hz)- C8 (4186Hz) Pickup error: ±1 cent Response time: <20 ms Working voltage: 3V Size: 60 x 70 x 17mm (with clip) Weight: 30g Colour: Black How to judge the pitch? The 4 strings of the violin are 1E, 2A, 3D, 4G Take the 2 string as an example The pointer is to the left, the pitch is low, and it needs to be high. The pointer is to the right, the pitch is up, and it needs to be lowered. If the 2nd string is displayed as 1E, it generally means that the pitch is quite high and the string needs to be loosened. If the 2nd string is displayed in 3D, it generally means that the pitch is much lower and the strings need to be tightened. If the 2nd string shows 2A, you only need to pay attention to the pointer direction, adjust it to the middle position, the screen turns green, it is in intonation status, and the same is true for other strings     Packing list: Violin Tuner x 1     Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing.  Manual measuring,please allow 1~3mm error,thank you.