The Switchcraft 318 Mini audiostixis used to connect devices such as laptops and MP3 players to house sound systems in conference rooms and auditoriums. The 3.5mm (0.25" mini) stereo input is converted to a single mono XLR output. Transformer isolation provides immunity from hum and buzz caused by ground loops and RF interference. Additional features include a volume control for quick level changes and a ground lift switch for eliminating noise issues common with consumer audio devices.