Bluetooth 4 with A2DP Stereo Audio, 8mm Dynamic Driver, Sweat Proof (IPX4), In-Line Microphone with 3-Button Remote, Flexible Loop for Secure & Stable Fit, Noise-Isolating Design, 6-Hour Playtime, Durable, Tangle-Resistant Cable, 3 x Sets of Ear Gels, Travel Stash Bag. The black Voyage BT In-Ear Bluetooth Headphones from House of Marley feature flexible ear loops for fitted placement a tangle-resistant cord 6-hour playtime and a sweat-proof IPX4 rating. These headphones are designed for athletic performance and are ideal for use with smartphones MP3 players and for those music lovers who like to move. The in-line microphone and 3-button remote on the cable allow you to take calls and control your music. Featuring 8mm dynamic drivers and a noise-isolating design the headhones have an angled ergonomic port and include two flexible loops for a secure and stable fit. In addition they include 3 sets of ear gels and a travel stash bag.