Brand new, unused! Instant purchase welcome! 【Industry-Leading Bluetooth 5.4】 Our wireless earphones are equipped with the latest Bluetooth 5.4, upgrading the performance of the Bluetooth earphones, significantly improving communication distance, speed, and stability compared to previous versions. Also, because the advanced Bluetooth 5.4 chip is adopted, it has extremely low memory usage and low power consumption, saving energy and extending playback time. The earphones have 4 times the data transmission speed and 10 times the data transfer capacity, minimizing signal loss, sound skipping, sound distortion, and delay of conventional Bluetooth earphones, and increasing penetration. Excellent compatibility with iOS, Android, Windows smartphones, tablets, etc. 【Hi-Fi High Sound Quality】 These wireless earphones are equipped with high-quality sound technology that upscales compressed sound sources such as CD sources and MP3s, as well as music and video distribution services, to high-resolution sound quality equivalent to Hi-Res. They support high-quality music formats such as AAC and SBC, have high sound insulation, and are compatible with an equalizer that optimizes according to the volume, allowing you to enjoy high-quality sound at any volume. 【Long Playback Time: 50 Hours of Music & LED Display】 These wireless earphones have a playback time of up to 8 hours when fully charged, and up to 50 hours when used with the charging case equipped with an LED display. In addition, because it is equipped with an LED remaining battery display, the status of the Bluetooth earphones is clear at a glance. The numbers on the display can be clearly displayed from 0 to 100%. The digital LED display allows you to check the Bluetooth earphone connection status and charging status at a glance, allowing for efficient planning of use, and you don't have to worry about running out of battery all day long. 【Automatic Pairing & Easy Operation】 After pairing these Bluetooth earphones with your smartphone for the first time, when you use them again, they will automatically pair with your smartphone just by taking them out of the charging box. Equipped with a highly sensitive touch sensor, basic operations such as "answer/reject, play/pause, Siri call, previous/next song, volume up/down" can be achieved with a light touch on the headset. Operation is simpler and more comfortable than conventional mechanical buttons. 1600r8814