Jacks

1/4” to 3.5mm jack adaptor module

This is a 4HP passive adaptor module; it provides adaptation between 3.5mm jacks and 1/4" (6.35mm) jacks. It has two mono channels and one stereo channel. The stereo channel include stereo 3.5mm and 1/4" jacks which are connected to two 3.5mm mono jacks: this can be used to break out left and right signals or used as third mono channel or used as an effects send/return channel or used to access low and high signals from a TRS (Tip, Ring, Shield) connection.

http://synovatron.blogspot.com/p/products.html