Hi-Fi Sound Earbuds Hands-free Earphones w Mic Sleek Metal Earpiece Headphones Headset Wired 3.5mm Black compatible with T-Mobile REVVL 5G, 4, Plus. Specifically designed for use with your Phone and Tablet, the Wired Headset integrated voice functionality gives you the freedom of hands-free phone calls. Durable cable and earbuds. It features durable style metal earbuds, a built-in microphone with power off/on button for comfort and ease of use. The Headset use the same speaker technology and sound signature used in professional headsets. Their noise-isolating in ear design sits inside your ear canal to create a seal to the outside world that effectively isolates outside sound. So it's just you and your music in a world of your own. Excellent sound quality and super clear sound. Cord mounted ON/OFF button which lets you take calls and hang up easily. Comes in Bulk Packaging (Non-Retail Package).