product description: -Exclusive design patent, the earphone conforms to the ergonomic design, comfortable to wear, not easy to fall. -The ear design reduces the best bass in the world. -Unique magnetic control, not easy to drop. -Built-in high sensitivity microphone, the sound quality is clearer. -Built-in lithium battery, support 1.5 hours fast charging, provide up to ten hours of music / call endurance. -Bluetooth drags two to multiple sources. -Using the play button, you can control the music player and make and receive calls and other functions.

key parameter: (1) Bluetooth version: CSR4.1 (2) Frequency response: 20-20000Hz (3) Bluetooth frequency: 24Ghz (4) Pressure transmission distance: about 15 meters (disabled) (5) Color: gold, black，red