All control with a single gesture: In-ear headphones with True Wireless Stereo technology and proximity sensor. To pause music playback, just take off one of the headphones, and put it back on if you want to resume. It´s that simple! Double wireless charging system: The True Wireless Style 4 Ultra headphones include a double wireless charging system. They have a charging case with compatible Qi charging, and also include an extra wireless charging base, which also allows you to charge your smartphone. The definitive goodbye to cables! Light and compact: Thanks to their ergonomic design, the True Wireless Style 4 Ultra Earphones adapt perfectly to your ear, so you can listen to your favorite songs in total comfort. Up to 25 hours of battery life (5 hours for each charge of the headphones and 20 additional hours in the charging case). Voice assistant and touch control: Easily find what you´re looking for with the voice commands of the Voice Assistant. Play your music comfortably with the Touch Control and forget about buttons. With Bluetooth® 5.3 wireless technology and hands-free function. Features: - Proximity sensor to control playback by simply putting on or taking off your headphones. - Charging case with Qi compatible wireless charging so you can charge your headphones without cables. - Wireless charging base included. Charge your headphones or your mobile phone in the most comfortable way. - Enjoy your music and calls and forget about the battery with its 25 hours of autonomy (5 hours for each charge of the headphones and 20 additional hours in the charging case). - Ergonomic, compact and lightweight design to fit your ear. - Find what you´re looking for thanks to voice commands with Voice Assistant. - Compatible with the ESmart Connect App to configure and customize your headphones.