Product Describes: -Exclusive design patents, headphone ergonomic design, comfortable to wear easy to fall. -Ear ear design, reducing the worlds best bass. -Unique magnetic control, Not easy to fall. -Built-in high sensitivity microphone, clearer voice quality. -Built-in lithium battery, support for 1.5 hours fast charging, provide up to ten hours of music / talk endurance. -Bluetooth one with two to meet the needs of multi-source. -With a play button, you can control the music player and make and receive calls and other functions. Key parameters: (1) Bluetooth version: CSR4.1 (2) Frequency response: 20-20000Hz (3) Bluetooth usage frequency: 24Ghz (4) Pressure transmission distance: About 15 meters (disabled) (5) Color: Red,Black (6) Standby time: About 240 hours (7) Call/play time: About Total 4 hours Packing List: 1 * Bluetooth Earphone 1 * USB Charging Cable 1 * English and Chinese User Manual