Q: Why is the volume very small? A:You can adjust the volume on the headset as well the phone if you use Android phone. Q: How to deal with when you can't hear the other's sound duing the call? A: You need to change 'speaker mode' to 'u-two', if you use phone to answer the call. HIGHLY COMPATIBLE AND UNIVERSAL: Easy and fast pairing with smart phones and tablets, compatible with iPhone 7, 7 plus, 6, 6s, 6 Plus, 5, 5c, 5s, 4s, iPod, iPod touch, Samsung S5 S4 S3, LG, Motorola and other Android cell phones. Unique feature: Comfortable to wear The Humanized design let you wear it several hours without pain. Powerful battery Each battery has a 8 hour talk time and an 200 hour standby time. Take like 1~2 hours to full recharge. Noise cancellation Enjoy the noise cancellation and echo cancellation which makes streaming music from your phone more enjoyable in a 10-meter working distance.
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