How to match? For twin ears couple connection: 1. Take the headset out of the charging box, then the power will turn on automatically (Led: the left earbud is white-blue.) 2. Turn on the Bluetooth function of the device, search for "T1" and connect to it 3. When used again, it will automatically connect to your Bluetooth device The wireless earbuds can also be connected separately. Battery capacity (charge box): internal 500 mAh battery Battery capacity (earphones): internal 50 mAh battery Work area: about 10 meters / 35 feet Wireless version: dual mode Bluetooth V5.0, ultra low power consumption Standby time: more than 150 hours Working time: about 3-5 hours (single person); about 2-3 hours (pairing); support caller number, IOS system power display Wireless headset function One-button control for easy opening/closing, play/pause/switch music, hands-free calling, driving, work, meetings, running shoes Turn off wireless headset support all devices with Bluetooth, iphone x, iphone 8 7 6 plus, 6 seconds, SE, 5 S, IWATCH, windows Nokia millet laptop PC ZTE LG HTC Huawei S7 S8 S6 Galaxy Samsung iPod ipad included 1 *One pair of wireless headphones (left and right) 1 * charging case 1 * Micro-USB cable 1 * User Manual 2 * earplugs Note: Please use the 5V 1A adapter to charge, otherwise the headphones may be damaged.