ead earpieces are made from robust, attractive metal alloy. o dots. also feature a soft rubber silicone cable finish, helpfully making the cable tangle-resistant ??? so no more knots or messy pockets. o To ensure best sound quality during transfer, dots. also feature a gold-plated, 3.5mm stereo jack plug so are perfect with any iPod, iPhone, or other MP3 and MP4 players.Radiopaq dots.