MAGINOVO Bluetooth Headphones, Wireless Bluetooth Headset, Stereo Earphones for iPhone Advanced CSR V4.0, easy and fast pairing with smartphone's, tablets and other Bluetooth devices Lightweight earbuds, good for jogging, exercising, gym and other activities Built-in a lithium battery and supports up to 4 hours playing time after fully charge Comes with a storage box and high-grade packaging, ideal present for your families and friends CVC 6.0 technology offers optimal noise reduction to provide the crystal clear sound during calls and while listening to music