AUTO QUICK PAIRING: Take two earbuds from the charging case. Find the correct device and click the name to pair with your phone. Then you can wear them to enjoy music. After the 1st time of pairing, earbuds will pair with your phone automatically once taken out from the case. 72 HOURS CYCLE PLAYTIME: The playtime of fully charged earbuds is about 4 hours. The built-in 2000 mAh battery the storage case can charge on-the-go for about 18 times which extends the music time to 72 hours in total. In addition, the case can work as a power bank to charge your cellphone with the included OTG adapter. ADVANCED BLUETOOTH 5.0 & WIDE COMPATIBILITY: The Bluetooth 5.0 chip enables a more stable and quicker connection, less audio transmission loss as well as longer connection distance. The connection is still quite stable when earbuds are 33 feet away from your device. Earbuds support most Bluetooth capable devices like iPhone X, iPhone 8 Plus, iPhone 8, iPhone 7 Plus, iPhone 7, iPhone 6, Galaxy, Huawei, LG, laptops, TVs etc. ERGONOMIC DESIGN & SIRI ACTIVATING: Based on data of thousands of peopleƒ??s ears, both earbuds are snug to wear with unique design and smooth surface. 3 pairs of ear caps in different sizes are included to help prevent earbuds from falling off. No matter small or big ears, choose correct ear caps and they will stay in your ears firmly. Press the button on either earbud for 2s and release when it beeps and Siri or Google assistant will be activated.Then just talk with your phone to operate it. SUPERIOR STEREO SOUND QUALITY & WATERPROOF: The built-in premium speaker and noise reduction technology will provide an excellent listening experience. You can fully immerse in the music world, catch every music detail, and relax when wearing it even in a noisy place. With IPX5 waterproof level, earbuds can still work well when you wear them to exercise or walk in rain.