Hornet Electronics TM, QY8 V4.1 Wireless Bluetooth Headphones Noise Cancelling Headphones with Microphone,[Sweatproof, Mini Lightweight, Heavy Bass Metal] Best in-Ear Stereo(Black) Hornet Electronics TM, QY8 is equipped with Bluetooth 4.1 + EDR APT-X audio decode technology, offering you perfect stereo sound. And it can connect with 2 cell phones or tablets at the same time:Please note that in order to solve the problem that customers can't stay in their ears, we also add a pair of ears hanging in the packing, so they will re-open the packing, if you get the not good packing that you think , we are sorry for it and hope to get your understanding Fully sweat-proof: with functional user interface, in-ear heaphones design, and a 10-meter working distance, our headphones will let you enjoy music through a variety of activities. Simple-to-use: control all functions of your music (volume, sound, song selection) and calls from your phone via our simple-to-use user interface on the headphones themselves Long battery life: Built-in high performance polymer 80mAh battery, up to 5 hours talking/playing time, and about 75 hours standby time. Universal device compatibility/ Noise cancelling: the QY8 Headphones are compatible with most Bluetooth-enabled phones, and reduce external sound.