Rolls DB227 Podcast Pro mic/source passive mixer

Rolls DB227 Podcast-Pro is a microphone/source mixer. This device was designed to mix a microphone with a source signal either RCA or 3.5mm (1/8 inch?) signals. To a single XLR output at microphone level. The DB227 consists of two balanced XLR jacks (one female input, one male output). RCA input jacks and 3.5mm input jack.