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