Top One Tech NEW Wireless Bluetooth Headphones Noise Cancelling Headphones w/ Microphone [ Sports / Running / Gym / Exercise/ Sweatproof ] Wireless Earphones for iPhone and Android(4.1) Bluetooth 4.1 technology,the signal strength is nearly twice times than the general bluetooth headset in the market. Awesome portable and lightweight wireless headset can be stay in your ears comfortablely Adopt the most advanced bluetooth CVC6.0 noise cancellation, it can accurately distinguish the difference between voice communication and noise,and judge it intelligently through the transmission between different decible and reduce noise decibels.Which makes you enjoy a clear sound even through you are in a noisy environment. Pairing is pretty intuitive and will pair with all mobile phone except the phone dont have bluetooth function,Built-in rechargeable Grade A polymer 80mAh battery lasts close to 4.5h talking time,5 hour music time, makes you do not worry the bluetooth device out of juice in your daily life Latest Bluetooth 4.1 Technology with A2DP & AptX, it enables pure, professional, uncompromised music and sound quality . QCY QY7 playtime to a solid 5 hours. or 175 hours standby