Bluetooth Earphones, Wireless Bluetooth V4.1 Sweatproof Headphones with Adjustable Earbuds, In-Ear Noise Cancelling Headset with Microphone Stereo for Running & Sports HD STEREO SOUND: 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 Extra-long Battery Life: Ultra durable built-in 120mah rechargeable lithium battery provides up to 6 hours music time, 6.5 hours talk time and up to 240 hours standby time, only 2 hours charging time, so you have less time charging and more time doing. ADJUSTABLE EARBUDS & EARHOOK: The connection part between the earhook and body can extend up or down by 3 mm. speaker mounting bracket can rotate 60 degrees to the left and right.it also can be adjusted at the ear up and down by 60 degrees.So you can adjust the angle fit in ears. SIMPLE-TO-USE: Built-in microphone, multifunctional key allows you power on/off, answer/hang up/reject the call, pause and play. Easy to operation. SWEAT PROOF: Outstanding sweat-proof, moist-proof, and rain-proof in-ear design, ideal use as gym headphones, sports headphones, running Headphones or just hanging out listening to music and watching videos.