Advanced Bluetooth 4.0 Sports Stereo Wireless Headphones Earbuds for iPhone 6/6 Plus 5s 5 Samsung HTC and All Smart Cellphones Advanced technology: Bluetooth 4.0 Compatible with most bluetooth enabled devices. Ergonomically in-ear designed to fit ear canals: comfortable and stable to wear for exercise. Memorized auto pairing. Up to 10 meter effective range. Three-way talking function: double-click to end the one call and accept the other; one-click to hold and take the incoming call. Perfect for jogging, running, gaming, driving, cycling and working.