<ul><li>Support TF card</li><li>Works with or without Bluetooth capability</li><li>Easy to controls your headphones</li><li>Adjustable headband</li><li>Foldable portable design</li><li>Standby time: 120 hours</li><li>Use time: 4 hours</li><li>Battery: 250mAh rechargeable lithium battery</li><li>Function: to adjust the volume, switch songs, answer incoming calls, reject a call, hang up the phone, Bluetooth play, hands-free calls, telephone replay, Bluetooth back even, voice prompts, power display, FM, TF, EQ</li></ul>