Work for for 3.5mm jack equipment,Connect 3.5mm Male to 6.35mm Female（1/8" male to 1/4" female adapter）, allows you connect headphones to audio devices made of pure copper and its service life is much longer than plastic and gold plating.Please ensure that the 3.5mm port is fully inserted. Pure copper connectors resist corrosion and ensure minimal signal loss. Handy and portable, widely work with earphone, headphone, karaoke system and etc 100% Lifetime warranty,and friend customer service. Application：ANDUL Connect 3.5mm Male to 6.35mm Female（1/8" to 1/4" adapter）, allows you connect headphones to audio devices such as amplifiers or AV receivers with 6.35mm socket, widely work with earphone, headphone, karaoke system and etc and home audio equipment, such as amplifiers, mixing console, home theater devices, amplifiers or AV receivers;Features: ☀ Connector : 3.5mm (1/8 Inch) Stereo Jack Male To 6.35mm (1/4 Inch) Stereo Jack Female,Mics and Headphones to be plugged into a 6.35mm(1/4) stereo jack socket input ☀ Compatible with headphones, compatible with sennheiser HD518 HD555 HD558 HD595 HD598 HD650 HD700 HD800, GRADO, AKG, audio-technical, Beyer dynamic, Sony etc. ☀ Material:Made of Pure Copper wire inside ☀ The new second generation colorful design, make life more exciting.☀ Pure copper connectors resist corrosion and ensure minimal signal loss.☀ 360 degree grip treads help easy plugging and unplugging.☀ Made of solid brass copper, with a much longer service life compared with those plastic one.Package includ：Audio adapter x 2 Pack.Warranty：LIFETIME Warranty