Bluetooth. 5 hours talk/music time. Hands-free phone calls. This item is electronically protected. Play Your Favorite Music & Answer Calls: Quickly syncs to your Smartphone or tablet, the earbuds provide balanced, clear sound reproduction for up to 5 hours of talk and music time. Easy to use volume and music playback controls with built-in mic allow you to answer or end calls. Wirelessly stream your music from any room with a Bluetooth range of 33 feet. Tangle-Free, Contoured Fit: Ergonomically designed to adjust to your ear, ensuring a comfortable, snug fit