"Make the right connection with our 3.5mm Adapters. Adapts 6.3mm (1/4in) stereo plug to two 3.5mm stereo plugs. Allows two 3.5mm stereo headphones to be plugged into the same 6.3mm (1/4in) stereo output such as headphone jacks from amplifiers, educational equipment, etc. Connectors: Two 3.5mm Stereo Female to 6.3mm (1/4in) Stereo Male. Adapts a single 6.3mm (1/4in) stereo jack to two 3.5mm stereo jacks."