Upgrade version of the popular SX-991: with active lifestyle sport yellow, feel more energetic; adjust the key "+"."-" to the side surface, more convenient that of the inside.</br>Unique Foldable and Retractable feature: more special and humanized than the universal neckband style design, quite easy to storage for pocket and better cord management, easy to carry on the go.</br>Top Sound Quality: adopt with the latest Bluetooth chip, hear richer and quite natural sound from your devices, and provides more fast and stable Bluetooth Pairing.</br>Crystal Clear Communication: built-in high sensitivity Microphone and combine with CVC 6.0 Noise Cancellation technology, ensures your chat without external noise or other interference.</br>Outstanding Battery Performance: Bluetooth 4.1 Offers a Faster, More Energy Efficient Connection and lower battery consumption, supports 18 hours talking time, 16 hours music playback time and more than 300 hours standby time.</br></br>Product Description</br></br><B>Specification:</B><BR> Correspond with: Bluetooth 4.1<BR> Support: HSP, HFP, A2DP, AVRCP<BR> Transmitting Power: Class 2 <BR> Working Distance: 10m <BR> Charging Time: 3.5 hours <BR> Talk Time: 18 hours <BR> Music Time: 16 hours <BR> Standby Time: 300 hours<BR><BR> <b>Amazing Foldable and Retractable Neckband Design</b><br> ★<b>Foldable Design</b> makes this Bluetooth headset more flexible. Convenient to storage in your pocket or your bag.<br> ★<b>Retractable Wire Management</b> keeps you from mass, perfect for sports and outdoor activities, leave your hands free but not miss any call.<br> ★<b>Luxurious&Smart Neckband Design</b>, without the hassle of wires, easy to move the headset and free your hands for other things.<br> ★<b>Special Sweat Resistance</b> is Exactly What You Have Been Looking For in Stereo Headsets!<br><br> <b>Bluetooth 4.1&CVC 6.0 Noise Reduction</b><br> ★Bluetooth 4.1 version assures to pair up in seconds to create seamless connectivity,offers crystal clear, natural sound.<br> ★CVC 6.0 Noise Reduction enables clearer sound from microphone, making your every phone call continuous and clear even in loud environment.<br><br> <b>Outstanding Battery Life</b><br> ★<b>iOS Battery Indicator</b>,you will know exactly how much battery is left when the earphone is paired with iPhone or iPad as the remaining battery life will be shown alongside the Bluetooth icon. <br> ★Music time up to <b>16hours</b>, Talking time up to <b>18hours</b>.You could enjoy wireless Sports/music time without any worry.<br><br> <b>Vibration and Voice Prompt</b><br> When the call is Coming, the Bluetooth Headset will be automatically vibrated so that you won't miss any phone call when doing exercise or even in the noisy place.<br><br></br><br/>http://www.amazon.com/gp/product/B01LY7SOL0