Double-layer shielded pure copper circuit board ensures the isolation and conversion of input and output signals, high sensitivity and low illumination reduction characteristics, and more excellent input and output conversion ratio. Built-in special permalloy transformer, stereo sound quality, delicate and transparent. The main body of the isolator is made of aluminum alloy shell, which is strong and not easy to crack. the 3.5mm audio cable is made of environmentally friendly PVC material, which is soft, durable and resistant to pulling. You can replace the 3.5mm audio cables with different specifications according to your needs. Small and portable, easy to carry. size: 65 x 25 x 25mm Material: Aluminum PVC colour: black Package Contents: 1 x audio isolator 1 x audio cable 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.