Hi-Fi Stereo Sound: Adopts CSR chip Bluetooth 4.1 smart compatible Bluetooth devices Built-in HD Microphone with CVC6.0 noise cancellationensure Hi-Fi Stereo Music Sound and Strong Signal. Let you get high quality and clear voice even in noisy environment such as inside a gymrunningdriving etc.</br>Ultra-long standby: battery capacity 260MA( is the same type of ordinary Bluetooth headset over 3 times)20-22 Hours Listening / Talking Timestandby time of about 30days let you reduce the frequent charging troubles!</br>Main Specs:20-22 Hours Listening / Talking Time30days standby timeabout 3 hours charging time 10 meters rangeNo obstructions	LED does not blink when working  Ultra light sweatproof and anti-dropping perfect for sport.</br>Connect to 2 bluetooth Devicessupport two mobile phones in turn call and listen to music so you will not miss any phone and information  Smart Voice Answer: yes / answer no / reject providing great convenience for you.</br>Bluetooth EDR APT-X audio decode technology offering you stable signal and perfect stereo sound. Compatible with most iOS/Android Mobile Phones & Pc Laptop.The use of 260MA polymer lithium battery?? comes with protection board function to prevent the potential risk of overcharge and over discharge??</br></br>Product Description</br></br><b>Product Description <br></b> This K618 Generic bluetooth headset is the perfect companion for smartphones?? with universal-fit confor