About this item LIGHTWEIGHT: Our lightweight headphones are the ideal solution for those who want to enjoy their music during exercise and travel, providing a convenient and comfortable experience on the go. FM RADIO: Enjoy your favorite radio stations on-the-go with a built-in FM radio, providing convenient and portable listening. 40mm: With dynamic 40mm driver technology, the headphones produce crystal clear sound and immersive listening. PHONE-CALL: Enjoy automatic switchover to incoming calls, ensuring that you never miss an important call while listening to your favorite tunes.