The Olympus PA-8 works with all 3.5mm microphone sockets allowing for two microphones to be plugged into one socket. It is supplied as standars with the ME30W conference recording kit. 

This is a genuine Olympus Dual Split Stereo Adapter also known as the PA-10. 

Key Features

• For use with all 3.5mm Jack Sockets
• Allows for two microphones to be used in one device
• Genuine Olympus Part (Also Known as the Olympus PA10)

What's in the Box

Olympus PA-8 Dual Split Stereo Adapter