Motorola 2.5mm iDEN HF Earbud with push to talk Brand New Motorola 2.5mm iDen Headset Hands free, In-Ear Earbud Style with Push-To-Talk: Very Comfortable in-the-ear boom microphone & earpiece is Quick & Easy to put on. Also has a miniature clothing clip to keep the cord in place. Compatibility: Phones and devices with 2.5mm audio plug