Bluetooth + stereo headset combo. Wireless headphone connects to other device that has Bluetooth capability, such as, cell phone ,tablet PC,laptop,computer etc. 3.5mm audio jack, provides a simple wired connection of a variety of devices without Bluetooth. Allow you to answer or reject phone calls anytime and anywhere. Charged via USB, rechargeable battery, convenient and practical. Playing time up to 10 hours, and continue talk time up to 7-8 hours, standby time up to 120 hours.