If you've already have a nice 2.5mm phone headset, why buy another expensive headset for your smartphone? Just buy this premium quality headset adpater! All you do is plug in the phone headset adapter and use your existing phone headset with a 2.5mm mic/audio plug on your 3.5mm smartphone jack. Works with any smartphone or device with a 3.5mm headset jack! Type: Wired Headset Compatible Phone Manufacturer: Universal