Warranty: J&D 1-Year Limited Warranty. Excellent Sound: dual shielding, corrosion proof gold plated connecters making the sound signal transmits with minimal signal loss. Plug and Play: Connect 2 separate audio play devices to headphone or speaker, turn off 1 device as needed to avoid frequent plugging; Or connect 1 audio play device to 2 headphones or speakers to share your favorite music anytime anywhere. Composition: composited of one 3.5mm female stereo headphone jack and two 3.5mm male headphone plugs. Durable Design: premium gold plated joint, durable copper shell; coated with anti-scratch PVC jacket, safe copper core.