Features:<br />1.CONVENIENT RETRACTABLE EARBUDS : Bluetooth Headsets with retractable wire management keeps you from mass・ good for sports and outdoor・ really set your hand free.<br />2.NOISE CANCELLING TECHNOLOGY: Featured with CVC6.0 noise cancelling technology・ our headphone filters out background noise to guarantee high quality sound and provides you clearer voice for calls.<br />3.BLUETOOTH 4.1 TECHNOLOGY: Provides a several-second and stable paring with your bluetooth enabled device. Offering you impressive dynamic sound even you are 10 meters away from your device.<br />4.FLEXIBLE & LIGHTWEIGHT: weighs only 1.3 oz in flexible and durable silicone neckband・ 50% lighter than any other neckband headset ・ you ll even forget you have them on!<br />5.ULTRA LONG WORKING TIME: Powerful rechargeable battery provides up to 13 hours of continuous talking/music time and 350 hours of standby with a single charge.<br /> <br />Specification: <br />Bluetooth chip: CSR BC8633<br />Bluetooth V4.1<br />Working Distance  10m (33 feet)<br />Battery capacity: Polymer lithium battery 120mAh<br />Charging Time 2 hours<br />Talk Time 8 hours <br />Music Time 5-8 hours <br />Standby Time 8 days<br /> <br />Packaging Accessories:<br />1 x Bluetooth Headphones<br />1 x USB charging cable <br />1 x User guide <br />3 x Ear tips(S・ M・ L)