Outerloop 3.5 includes a cable that plugs into the 3.5 mm TRRS headset/earbud jack of your mobile device, providing two-way communications. Separate Send and Receive level controls, a push-on, push-off Talk button, as well as a recessed sidetone level control let you adapt to any situation whether you are around the corner or around the world.

Adapting to the mixed-up intercom world, model OTL3.5-F features both 4-pin and 5-pin Female XLR headset jacks, while model OTL3.5-M features both 4-pin and 5-pin Male XLR headset jacks.