The latest Bluetooth 4.1 pairing with smartphones. The Bluetooth signal has a stable transmission distance of 10 meters. Bluetooth 4.1 technology enables quick transmission and smooth connection. The earphones are compatible with most Android/IOS/Windows devices. Thanks to in-line mic and button control, you can enjoy hands-free phone calls, adjust volume and mange previous/next track conveniently. Stay connected with Bluetooth 4.1: wireless earbuds pair with virtually any Bluetooth Device; stable connection provides stellar battery and signal performance Comfortable and secure design fits perfectly to your ear; the cable smartly stays out of your way when running, jogging or exercising. S6 Bluetooth Headset Mini Wireless Earphone I7 Bluetooth Headset Support for customization: support Bluetooth Protocol: 4.1 Transmission range: 10 meters Channel: stereo Single ears: bilateral stereo For gift-giving occasions: opening ceremony, employee benefits, awards, anniversary celebrations, exhibitions, promotions, festivals, housewarming, weddings, public relations planning, birthdays, business gifts Function: Power display, call function, support music, multi-point connection Use: Ear typeBrand: ML Color: Black-packed, white-packaged, black-naked, white-naked, PCBA-circuit board Support for customization: support Bluetooth Protocol: 4.1 Transmission range: 10 meters Channel: stereo Single ears: bilateral stereo