"Noise Masking" will be the future trend for Bluetooth headphones noise canceling. Ergonomic in-ear design with the ideal fit shape creates the best seal for enhanced noise isolation. XTREMTEC XT100 Bluetooth earphones built-in microphones, both earbuds are equipped with a high-performance MEMS mic, can reduce wind noise, filter ambient noise, and transmit voice clearly in any noisy environment to ensure high quality clear crisp phone calls or music. Advanced Bluetooth 5.0 Chip XTREMTEC XT100 true wireless earbuds use the most advanced TWS earbuds chip. Bluetooth 5.0 greatly improves the transmission speed and provides you with a low-latency listen-to experience. Creates an unbreakable connection between your device and earbuds even in busy spaces. The earbuds will be auto-pairing and reconnecting to your Bluetooth device for the next time. One Step Pairing Turn on the Bluetooth of your device, take the 2 earbuds out of the charging case. The earbuds will connect to each other automatically. Notice: If your wireless headphones are already paired to your Bluetooth device, they will automatically reconnect whenever the earbuds are taken out of the charging case. IPX6 Waterproof Earbuds The XT100 wireless Bluetooth earbuds are sealed with IPX6 rated waterproof protection. It is suitable for all weather use. No matter how you drop your earbuds into the water carelessly, you can quickly pick it up without any problems. Don't worry on sweat and heavy rain that can enjoy high-quality music and conversation during sports, running, jogging, swimming, and yoga, etc. Longer Battery Life EXTREMTEC XT100 wireless earbuds adopt the most advanced technology, low power consumption, can last for over 7 hours playtime from a single charge and 30 extra hours in the compact charging case. The powerful battery within these Bluetooth earbuds allows for all-day listening. Smart Touch Control XTREMTEC XT100 Bluetooth earbuds with microphone can largely minimize the pressure to your ears when you touch the button for various functions. One-touch area control all aspects of the earbuds, more convenient than other Bluetooth earphones. Comfort & Secure Fit The shape of XT100 in-ear headphones perfectly fits every type of ear. With the Ergonomic in-ear design and 3 different sizes of round soft silicone ear tips, both earbuds offer more wearing stability and comfort when you`re running or jumping, the earbuds will stay-in ear securely. Questions & Answer Q: I paired the Bluetooth wireless earphones with my mobile device before, however, I failed to pair them again. A: Turn on the Bluetooth on your phone. Delete all your previous Bluetooth-connected addresses inside your phone. By selecting "XT100" under the list, then connect again. If it still cannot connect, please remove the Bluetooth connected address "XT100" under the list and pair your earbuds again. Q: Why the connection is not stable. A: When a Bluetooth signal is transmitted wirelessly, signals can be affected. Then, it would let the sound of the Bluetooth earbuds intermittent, in the following conditions: 1. The distance between the Wireless Bluetooth headphones and your Bluetooth device address is at the edge of the Bluetooth pairable distance. 2. Transmitted signals encounter obstacles or human body blockage. 3. There are high-power electronic devices nearby. 4. There are other Bluetooth devices are being turned on / off nearby. Q: Why does the power of the earbuds run out fast. A: The Bluetooth wireless earbuds playtime varies according to volume level and audio content. To avoid unnecessary power consumption, please put the earbuds into the charging case when not in use.