Cuitan Bluetooth 3.0 Wireless Sports Stereo Headphones Earphones Headset for Samsung, Apple, Huawei, Meizu, Coolpad, Xiaomi, Tablet, Laptop, etc, Neckband Style Headset for Bluetooth Devices - Black Bluetooth 3.0 wireless stereo headphones, compatible with all types of bluetooth devices (Mobile, Tablets, Laptops, PC Samsung, iPad, iPhone), can connect two devices at the same time. Built-in microphone for handsfree cell phone use; Built-in lithium battery (Charge via USB). Approximately 4 hours music listening, 5 hours talking or 8 hours standby time from a single charge. Neckband style provides a comfortable and stable fit. Water and sweat resistant. Ideal for sports indoor or outdoor.