FirstSound qcy qy7 V4.1 Bluetooth Mini Lightweight wireless stereo sports running & gym exercise bluetooth earbuds headphones headsets noise cancellation and in-ear Ear-canal-fit Design for iwatch iPhone 6 6Plus 5S 5C 5 4S 4 iPods HTC iPad Samsung Galaxy Note 3 Note 2 S5 S4 S3 S2 LG MOTO X most Android Smart Phones and Tablets and other Bluetooth-enabled tablets Up to 6 hours of Talk/Playing Time and 160 hours Standby Time, the longest battery life in all over the market with similar products. Sweat-proof, durable design, Bluetooth 4.1 technology,the signal strength is nearly twice times than the general Bluetooth headset in the market. Noise Cancellation and listener fatigue reduction, it can accurately distinguish the difference between voice communication and noise, judge it intelligently through the transmission.