When you work out, your earbuds should stay with you. Designed for an active lifestyle, the Jabra Elite 4 Active headphones are equipped with sweat and waterproof IP57 protection, and their protruding, ergonomic design feels comfortable and sturdy in the ears. In addition, they have active noise reduction, an equalizer that can be adjusted with the application, and HearThrough transparency technology. The active anti-noise function (ANC) suppresses the disturbing sounds of the environment with one press, so you can fully focus on your training and your playlist. The operation of the HearThrough technology, on the other hand, is based on amplifying the external sounds detected by the microphones of the headphones, so that you can hear the sounds of your surroundings accurately through the headphones. The feature is especially useful when, for example, you are driving in traffic or talking with others with headphones in your ears. The headphones have four wind-protected mesh-covered microphones, so your voice is clear when you make hands-free calls. By downloading the free Jabra Sound+ application to your smartphone, you can customize the sound reproduction by adjusting the bass, treble and other features with the equalizer. In the app, you can also activate Android-compatible Spotify Tap playback. With one charge, you get up to seven hours of listening time with your headphones. With the charging case, the playback time is up to 28 hours, and the convenient quick charge gives an additional hour in just 10 minutes if necessary. Mono mode enables both headphones to be used individually.