Signature effect is a commercial form of effect manufacturer. Guitars, effectors and speakers signed by famous musicians are all listed. These products are all signed by a musician. Of course, it's from batch print, and the relative price is higher. For example, the Deng Lupu M 108 ten-stage balance effector, which is signed by Kailijin, is about more expensive than ordinary 200 yuan, and there is no difference in actual use. And musicians don't necessarily use their own signatures, just like ZAKK doesn't use his own signature overload effector ZW44.