Otium Power Bluetooth Headphones In-Ear Sport Wireless Earbuds, CVC 6.0 Noise Cancellation, Stereo Sound with Mic, IPX4 Sweatproof Sports Earphones for Running, Workout, Gym (Black) Fashion outlook and behind-ear design accord with ergonomically, make the headphones will not leave your ear even during the most strenuous exercise movement. Perfect fit for Running, Jogging, Biking, Driving, Fishing, Camping, Hiking, other Fitness and Outdoor Sports. Bluetooth V4.0CSR Technology and Bluetooth V4.0 make a stable connection for seamless syncing with your favorite bluetooth devices, including iPhone, iPad, Android cell Phones, Tablets, PC, Smart Watch and more up to 10 meters 33 feet. IPX4-Rated Splashproof: Built for your active lifestyle, Otium Bluetooth Earbuds support rated IPX Level 4 Sweatproof Technology, could withstand dripping sweat, heavy rain, even a splash from your sports drink! High-Fidelity Sound: A2DP technology ensures that perfect sound is delivered to your ears each time. CVC 6.0 noise cancellation feature creates the optimal environment for listening to your favorite tunes, built-in microphone for clear calling and friends chatting. Simple Use: Just Press the On-off Button for about 5 seconds until Blue and Red LED Light Alternatively Flashing, find and connect with your phones, then you can enjoy music or calling wirelessly. And it would reconnect automatically next time. The headphone battery status will be automatically displayed on the IOS Phone screen.