The blue tooth earphones are secure behind your ears and rest comfortably in the ear canal. The power of blue tooth V4.1 technology for seamless syncing to your favorite wireless devices. It can deliver up to 9 hours of play time on a full charge. Voice prompt allows notification of incoming calls and phone numbers, so never miss a phone call. It is great for Gym, Running, Jogging, Hiking, Cycling, and impact Sports. Your logo is welcome.