Wireless In-Ear Headphones, Bluetooth V4.1 Wireless Bluetooth Headset Earphones Earhooks w/ Retractable Earbuds for iOS, Androd Device (Red) Top-rated Best-selling Bluetooth V4.1 Headphones Wireless Sport Headset Noise Cancelling In-Ear Earphones HD Stereo Clear Sound Retractable Earbuds for bluetooth-enabled devices in Red. Made of premium grade soft TPU + hard PC Shell material, crafted using a state-of-the-art molding technique for extended durability and life-long performance. Designed with sealed light-touch keys impeccably embedded for convenient access and improved user experience. Equipped with Bluetooth V4.1 offering seamless, fast pairing and strong, stable signal. Constructed with advanced aptX codec technology delivering Incredible Audio Experience with its High Fidelity Stereo Music, Clear speech and Powerful Bass sound. Features advances In-ear Ambient Noise Reduction Echo Elimination CPU and 120 mAh high-quality lithium polymer rechargeable battery that delivers a clean audio experience offering up to 6 hours of music listening enjoyment and continuous call duration of 6.5 hours. Simple and intuitive user interface that allows control all functions of your music (volume, sound, song selection) and calls from your phone. Retractable Earbud Design - the connection part between the earhook and body can extend up or down by 3 mm and a speaker mounting bracket that allows 60-degree left-to-right rotation. It can also be adjusted at the ear up and down by 60 degrees. Also features exceptional sweat-proof, moist-proof, and rain-proof design.