We improve the Bluetooth signal problem make it more steady?? it supports two connected devices simultaneously and allows to automatically connecting after paired successfully for the first time?? high-fidelity stereo sound quality with aptx codec. The Headphones are compatible with most cell phones?? iPhone and Android.</br>These Noise Canceling Earbuds include ear tips and special ear-hook design to ensure a comfortable and secure fit for everyone. With the specially designed ear hooks?? you will never worry about the headphone falling off in a gym or workout again.</br>Wireless Bluetooth Earphones allow auto switching between music and calls. You can control all functions of music and calls easily via the buttons of Bluetooth headset. Built-in microphone enables taking hands-free calls while listening to music.</br>Built for your active lifestyle?? the earbuds are rated IPX Level 4 and can withstand dripping sweat. Er