& BLUETOOTH 4.1 TECHNOLOGY: Latest wireless bluetooth 4.1 technology with A2DP stereo tech provides you a Hi-Fi quality stereo music crystal clear sound and steady bluetooth signal while doing your housework gardening doing sports etc</br>& NOISE CANCELLATION TECHNOLOGY: Built-in microphone with CVC6.0 noise cancellation in-ear earplugs filters out background noise to guarantee high quality sound and provides phone conversation with clear voice even in noisy environment like inside a gym and running/cycling on the road</br>& VIBRATION ALERTS & ULTRA LONG WORKING TIME: Vibration works out when power on or calls coming in no worried about missing any calls any time. Powerful rechargeable battery provides up to 15 hours of talk time 12 hours of music and 500 hours of standby with a full charge</br>& NAMOMETER NECKBAND DESIGN: NAMOMETER rubber neckband provides super light and flexible function specially designed for easy carrying and long time wearing with invisible feeling. Neckband style prevents troublesome wires from tangling organized and convenient for daily liferunning walkingbiking?? working?? driving</br>& AMAZING COMPATIBILITY: By using the latest bluetooth 4.1 technology the headphones is able to conn