The Jabra Elite 4 Active is ergonomically designed and completely wireless earbuds for a secure, comfortable fit. IP57 compliant, waterproof and sweatproof, can be used for going out or working out. Intuitive Sound+ app for customized sound quality. Active noise cancelling and adjustable heather-thru feature allows you to switch between immersive sounds and external sounds with just one touch. 4 microphones protected by a special mesh cover to prevent wind noises for clear, clear calls. Mono mode allows you to charge one side while in use, so you dont have to worry about running out of power. Up to 7 hours of battery life with only the earbuds. Up to 28 hours when used with case charging. 10 minutes fast charge will last up to 1 hour. Pairs with up to 6 devices Bluetooth 5.2 AptX compatible. Amazon Alexa, Spotity Tap Playback, Google Fast Pair Compatible (Compatible with Android OS 6.0 or later) Product Questions Please refer to the Jabra Website Support Page for FAQs or provide staff instructions on how to use them at the Jabra Support Center in Japan. TEL: 0120-818-203 9:00-17:00 (excluding weekends and holidays)