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, redPacking list:1*Bluetooth headset