Wireless Bluetooth Sport Stereo Universal Headphones Headset Mini Running Gym Exercise Cordless Sweatproof Earphones Earpiece w/ Mic for Smart Phones Devices, GreenCategory: 2.5 Mm Universal EarpiecePerfect Unique DesignBluetooth 4.0 version of the signal strength is 2 times the normal version, it has a greater ability to process information more efficiently to ensure the long-distance calls or listen to music clarity.Accurate sound convey is not delayed, CPU 80MHZ in a high-definition quality, brings you an unprecedented experience.Precision tune designed to allow sound purity increased by 20%, reaching a more beautiful sound effects.The new Bluetooth version 4.0 offers more efficient transmission, clearer sound quality for your great pleasure.Most Practical HeadphonesStereo, plus finely tuned premium audio, makes the superlative high-quality sound. Clear and low frequency, as the concert site in person, rock, blues, jazz, pop and other musical styles can easily deduce, gives you superior audio experience.Bluetooth support for hands-free, headset, AVRCP, A2DP.Intelligent design is fully compatible, with the market 99% of Bluetooth devices.Note: 1.Before you start using the headset, please use the USB charge cable to charge it first. 2.HERMES' voice prompt is English by default. It can be switched between English and Mandarin by holding down the + and - buttons at the same time when on.3.Pairing, press the power button of the headset, you will see the blue-red light blinking, it will automatically enter pairing mode. 4.Make sure you turned on the bluetooth on your phone, search headset model on it. The headset support the laptop which with built-in bluetooth adapter or inserted in a third party bluetooth adapter. 5.Select the Bluetooth model and click connect. Enter the password or code 0000 if needed.