[HIFI high sound quality] Although the conventional wireless earphone has a disadvantage that the sound quality is inferior compared to the wired type, with the advent of the new "IP010-A", this problem is also solved. By adopting high sound quality and low delay aac for codec, if you connect between compatible devices, produce with natural stereo sound, correspond to high resolution sound source, listen to a wide range of sound with high sound quality from low range to high range. [Auto ON / OFF & Auto Pairing]: "IP010-A" Wireless earphone does not need to press the power button because power is turned on simply by open the lid of charging case. "IP010-A" Wireless earphone once connect with Bluetooth device once, there is automatic pairing when you use again. Just open charging box and they will pair with each other. [Secure Fit& Mini Design] Extremely light weight and mini in-ear design with two pairs of ear tips to ensure your headphones stay comfortably firm in place and improve the experience on sports. [Multi Control Button and Sweat proof ] With multi control button on the bluetooth earbuds, you can finish all actions, such as power on/ off, answer/reject calling, play/ pause/prev/next song and wake up Siri. In addition to the waterproof structure of IPX 5, it also has sweatproof function. You can use it with confidence, without worrying about the light rain or sweat during exercise. How to pair? For Twins ears pair connection: 1. Tear off the protective film on new earbuds, put earbuds into charging case( make sure it is charged and keep cover open), they will be power on automatically (Led: left earbud white-blue flash. ) 2. Turn on your device bluetooth function, search "IP010-X" and to be connected 3. They will automatically connect to your bluetooth device when you use again 4. This wireless earbuds also can be single connection.