Wireless Neckband Hands-free Stereo Bluetooth Headsets Headphones Earphones Earbuds with APTX for Smart Phones with Bluetooth 4.0 (Black Blue) Comfortable hands-free neckband style, feel free to make a call or listen to music with your friends even when your hands are busy Charging 2 hours, you can have 12 hours talk time, 10 hours play time, and 480 hours standby time before you charge the headphone Easy pairing with phones with Bluetooth 4.0, also, you can leave your phones and the headphone within 10 meters (no obstacle) Voice Actions with compatible phone, Call, Answer and Redial the last number. And it also has battery status alert. It will vibrate when a call is coming in Built with CSR8635 chip, noise reduction & echo cancellation,sweat-proof, Apt-X Technology