Bluetooth Headphones, Wireless Neckband Bluetooth Headset, Sweatproof V4.1 APT-X Noise Reduction Earbuds Earphones with Microphone & Stereo for Sport Running with Magnetic Attraction for iPhone-Green 1. BLUETOOTH V4.1 + EDR APT-X: offering you perfect stereo sound. Playing music time: up to 4 hours. Talk time: 5 hours; Charging time: 2 hours. 2. TWO BLUETOOTH CONNECTION: connect with 2 cell phones or tablets at the same time.You will not miss any important calls.Phone above the status bar displays the electricity consumption of Bluetooth for iPhone users. 3. MAGNET ATTRACTION DESIGN and SWEAT/WATER PROOF: hang like a necklace around your neck, and a 10-meter working distance, our sport headphones will let you enjoy music when running, gym, sports & exercise and other activities. 4. SWEAT-PROOF DESIGN: You can enjoy music while running, jogging or doing other exercise. 5. WHAT-YOU-GET: Stoon Sport Bluetooth Headset, 18-month worry-free warranty, and friendly customer service. Please send us an email if you have problem.