Description Adjustable rotate button potentiometer is a manual with manual control. Can control the effect of a variety of functions, such as level, speeds, voice, etc. Can be used for synthesizers, electric guitar, etc. The product is suitable for people to use. Features -Material: Plastic.-Replacement parts for your loved electric guitars.The product has creative design and fine workmanship.- The knobs are a manual elements with manual control. Can control the effect of a variety of functions,such as level, voice, etc.Can be used for synthesizers, electric guitar.- The product is made of good quality material, which is practical and suitable for people to use.- The product can be given as a good gift to your friends, which makes them feel happy.- The product will be a good helper soon when you need to take advantage of them for a long time.Packing list: 2 x Rotary Knobs