The effect of electron interaction:Electronic black holes mainly absorb noise to improve sound quality. By connecting the device casing, ground wire, shielding layer, etc., they absorption noise, reduce electrical interference, improve background paint blackness, and make the sound clearer. Electronic black holes can improve the background tranquility of sound. When the background is dark, the details naturally be rich, and the air feeling be fine, instantly presenting more outstanding details. Electronic black holes can improve the spatial sense of the sound field. After the spatial sense is enhanced, the sound field naturally becomes , and at the same time, the positioning of human voices and instruments becomes clearer and more natural. Electronic black holes can improve the density and roundness of intermediate frequencies, making human voices sweeter, more delicate, and more magnetic, reducing equipment noise. Electronic black holes can stabilize signal transmission and reduce signal fluctuations caused by power lines or other electromagnetic sources. Specification:A:3.5mm Plug Color: black Material: plastic+metal Package Contents: 1 x Noise Isolator Accessories Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.