Wireless Sport In-Ear Headphones by SMS Audio. These professionally tuned in-ear earphones deliver an unsurpassed listening experience under any condition. This piece features a 6mm micro driver for professionally tuned studio mastered noise, stay fit wings designed to lock ear buds in place, and a three button mic with volume control. It is sweat & water resistant, and deliver up to 8 hours of music on a single charge. Remaining the amazing noise & lose the awkward wires with the SMS Audio Sport Wireless In-Ear Headphones! Materials: Plastic, Leather Dimensions: 2.5"L x 5.75"W x 5.75"H: Weight: 0.8 lbs.