MS-771Wireless Bluetooth Multi-function Headphone with Built-in Card Reader Product Information The MS-771Stereo Bluetooth Headset is a convenient wireless headset that is beautiful designed to match your style. Connects with your Bluetooth-enabled mobile phone or audio device or operates on its own and lets you enjoy listening to your favorite music on-the-go or make and receive hands-free phone calls. It has a fashionable design, supports all kinds of Bluetooth-enabled devices like Mobile phone, Laptop, Notebook, Mp3/4/5 including Apple iPhone, iPad, iPod. Features Bluetooth V3.0 for stable connecting and power saving High precision 40mm moving-coil unit, brings you vivid sound field, sound clarity and sound shock feeling Built-in microphone for hands-free call, enhanced driving safety Easy control button features: ON/OFF, volume down/up, previous/next track and play/pause Over-ear design with skin-friendly leather material, quite comfortable for long time wear TF card slot allows you to play music from the TF card (card not included) Has passed CE, RoHS certification Built in rechargeable battery Specifications: Model: MS-771-771 Operation distance: =10m Speaker diameter: 40mm Frequency response 20Hz – 20KHz Built-in Microphone Impedance: 26O maximum power: 10mW Rechargeable battery: 200mAh Charging voltage: DC 5V Working voltage: DC 3.7V Talking time: 8-10 hours Music time: 4-6 hours Compatible with: iPhone, saMS-771ung, sony, PC, mp3 Players etc. Bluetooth enabled smartphones, Bluetooth enabled laptops Bluetooth enabled music players Package included: 1 x MS-771Wireless Bluetooth Over-ear Headset Headphone 1 x USB Cable 1 x User Manual