ienza&reg; 3.5mm Male 4 Pole to Two 3.5mm Female, Replaces Sennheiser PCV 05 Combo Audio Adapter Combo Audio Adaptor: 2 x 3.5 mm jack for mic / headphone to 3.5 mm 4 Pole jack Turns a 3.5mm combo headphone/microphone port into two (2) distinct jacks - one 3.5mm headphone jack and one 3.5mm microphone jack Allows the use of older audio accessories with newer computers. Replaces "Sennheiser PCV 05 Combo Audio Adapter" ASIN B00IM36VU0. Works great with "Sennheiser PC 363D High Performance Surround Sound Gaming Headset" and other similar PC Gaming Headsets with separate mic and headphone jacks. ienza is a registered trademark. ienza products are developed as cost-effective alternatives to OEM parts. They are not necessarily endorsed by the OEMs.