3.5mm Stereo TRS Male Plug to 3.5mm Mono TS Female Jack Audio Adapter, AD-A37G 

This 3.5mm stereo to mono adapter features a 3.5mm Stereo TRS male plug on one end and a 3.5mm Mono TS female jack on the other end.

Specifications:

• Convert a stereo signal into mono
• (1) 3.5mm mono female
• (1) 3.5mm stereo male
• Gold-Plated Contacts
• Solid metal construction

CablesOnline Part Number: AV-A37G