Mono Headset Single Earbud Earphone Headphone for T-Mobile Motorola Moto X - T-Mobile Nokia Lumia 521 - T-Mobile Nokia Lumia 635 - T-Mobile Nokia Lumia 925 - T-Mobile Samsung Galaxy Avant (SM-G386T) High Quality Premium Brand Ergonomic Wired Headset compatible with all 3.5mm devices. Comes in Bulk Package(Non-Retail Package). Brand new high quality MP3 earbud and hands-free headset for your phone/tablet/mp3. Includes a Send / End key on the mic to allow you to receive and end calls with the push of a button. This Headset allow hands-free phone calls. THIS IS A MONO HEADSET WITH ONE EARBUD. In-line microphone: Microphone reduces background noise, & increases the volume & clarity of your voice transmission. - Excellent audio quality.