Original Motorola V3 Razr EMU to 2.5mm Headset Adapter Your Motorola V3/ V3c/ V3i/ V3X/ V3M/ RAZR/ U6/ PEBL/ L7/ SLVR/ L6/ L2/ V323/ V325/ V360/ V361/ V365/ KRZR cell phone requires a 2.5 mm audio adaptor for a standard "universal" hands-free headset to work. This is the Motorola Factory original Mini-USB (EMU) to 2.5 mm audio jack adapter piece only, and not the wired hands free headset. Just plug this Motorola SYN1505/ SYN1505A/ SYN1505B audio adapter into the Mini-USB (EMU) audio jack of your cell phone to convert the audio for use with any wired, standard, non-amplified, 2.5 mm jack, 2 ring, 3 connector, audio device. Important: Not compatible with wired headsets using a Microphone Volume adjustment, or a Microphone Mute feature! Headsets that have the Earpiece Volume adjustment, but no Microphone Volume adjustment will work.