Upgrade to the ultimate sound experience with the 45mm speaker set and matching software.With a standard 3.5mm jack, these speakers fit practically any communicator on the market, no matter what brand.Owners of cardo freecom and packtalk series will enjoy extra boost with the new jbl sound processor and firmware.Not a freecom or packtalk owner? no worries; this powerful hardware will still drive your headset audio performance to new heights.