Easy Connect and Extensive Range Bluetooth 4.1, enjoy a 30 feet range of connectivity. 4 hrs of play time Lithium-ion battery lets you enjoy up to seven hours of play time, rechargeable with USB power sources. Super Bass and HD Sound Boasting of crisp HD sound, deep bass, clear mids and transparent highs. Stylish Finish Rugged, Metallic exterior body made from premium materials that is sure to withstand most conditions. Hands-free Power on, Take calls and control your music with In-line Mic and Multi function button. Also convenient opening to charge your earphones. Always in place Ergonomic Design for secure fit to keep the headphones comfortably in place during workouts. Comes with small, medium and large buds to match your ear size Tangle Free Design with adjustable clip Tangle Free Design with adjustable clip to define the perfect length for you. Specially designed carry pouch with a snug fit Securely carry your earphones, to the gym, office, on travel or anywhere in the compact and light weight pouch. Noise Cancellation CVC 6.0 Passive Noise cancellation allows for excellent, detailed sound by keeping the unwanted noise out while still allowing you to be aware of the surroundings. Bluetooth Version: 4.1 Bluetooth Range: 32 feet Impedance: 16 ohms Speaker sensitivity: 113 db+/-5 Frequency Range: 20Hz~20KHz