Connect to Bluetooth and a prompt will pop up. Bluetooth 5.0 offers a much more stable connection. The microphone is noise-reduced and the sound is clear and crisp, making it sound like face-to-face communication. Smart touch, easy to operate music and calls. Store and charge in one, the headset is automatically connected after it is removed. Mini 400mAh charging box, rechargeable headphones about 3-4 times. The silicone case provided is effective against scratches, and the hook design makes it easier to carry. Integrated proximity sensor technology, pauses and replay when users remove the headset from the ear. Specification: Bluetooth: V5.0. Battery: 400mAh. Working distance: 10M Working time: 3 hours per Charge Standby time: about 100 hours. Material: PC fireproof material. Headphone size: 40x17mm. Headphone box size: 53x44mm. Voice dialing, answer/end function, auto pairing. What's in the box 1X Totu EAUB-034 Headset, 1X Charging Case, 1X Carry Case, 1X Lightning Cable, 1X Hook Attachment, 1X User Manual