G-Cord (TM Aluminum Lightweight On-Ear Stereo Wireless Bluetooth V4.0 Headphones Headset with Built-in Mic Light weight headphones optimized for extremely comfortable fit, you can wear all day long Ultra-portable and adjustable on-ear design , easy to adjust to a comfortable way for different ear Deep, powerful and stereo sound for the music you love. Inline mic/remote for music and calls. Total hands-free convenience Built-in rechargeable Lithium battery lasts up to 8 hours of music time, universally compatible with most Bluetooth-enabled phones. Works with IPhone, iPad, Android and Windows Smartphones tablets and other Bluetooth devices The on-ear design provides good noise isolation for travel, work, study and Anywhere Can be used both wired (via 3. 5mm plug, NOT include in package) and wireless