Estar Headset lets you enjoy great sounds on-the-go. Comfortable and snug fit make sure the headset stays put when you are out running, jogging or exercising. Cut the cord and break away from wires with Bluetooth 4.1. You can enjoy excellent sound performance from this durable, lightweight and sweat-proof headset. Work out and stay fit with clear, natural sound that drives you forward. Not just for music, the headphone is also a great choice for making phone calls with friends and family. CVC 6.0 Noise Cancellation technology filters out the surrounding noise and makes your sound loud and clear. You get high quality, hands-free phone conversation even on the street or inside shopping mall. Specially designed ceramic antenna improves signal strength and tolerates more interference, your music becomes smooth without noise or breaks. When taking phone call with the built-in microphone, your voices are clearer and easier to be heard. Faster and more efficient than ever before, Bluetooth 4.1 improves over the past version with quicker response and lower frequency. You get longer running time and high quality sound. With up to 5 hours of playtime and just 1 hour of charging time, you spend less time charging and more time doing. With six months warranty from the date of delivery.