The red cardboard guitar tuner can solve the noise problem, requiring strong bass and powerful power. It is also widely used by good basses or basses with a variety of tones. The red cardboard guitar tuner has beautiful sound, which can be connected to electric guitars, electric basses, and other instruments. It is the main tuning device for the string group in modern orchestras. The red cardboard guitar tuner is overall black in design, with a longer black cable connecting the instrument. It is packaged in a red cardboard box. The red cardboard guitar tuner is produced in Zhejiang, China, and the price is negotiable or by telephone. The minimum order quantity can be customized according to customer needs.