Ecandy Wireless Bluetooth Headphones Noise Cancelling Headphones with Microphone,Sweatproof,Mini Lightweight,In-Ear Stereo Wireless Bluetooth Earbuds Headsets Earphones,Black QY8 Upgraded Version. Featuring latest Bluetooth CSR4.1 and build-in gold-plated antenna design, the signal is twice times stronger than the common one, supporting 33ft(10meters) working range. It also allows to pair with two devices simultaneously. Stylish Appearance. With UV process, they are sleek, in black with silver detail. Ergonomical in-ear design offers you snug and stable fit. Ideal for exercising, running, cycling, walking and all kinds of indoor or outdoor activities. Unique Design. With a buckle, you can adjust the cable length as you like, gaining better sound experience while exercising. This headset is so small you won't even realize it is in your ear. Wear this headset for unltimate comfort.