Mini Invisibility: Bionic ear patch curved design, naturally fits the auricle, and does not feel uncomfortable or oppressive when sleeping on the side Subwoofer: Second generation acoustic chamber+digital enhancement technology, providing a immersive feeling like being in a concert venue Pulse DT4.0 directional non-destructive technology for sound transmission: Detects the shape of the ear canal, automatically adjusts the propagation angle of the integrated sound beam by ± 25 °, ensuring efficient sound transmission into the ear canal Endurance: Low power chip+large capacity lithium battery, strong endurance and powerful battery reserve Power Display: The charging compartment is equipped with a clear and eye-catching digital display function to control the battery level of the charging compartment at any time Noise Reduction: Dual microphones for directional sound collection, allowing for clear communication even in noisy environments, providing a high-quality communication experience Game sound and image synchronization: The game sound has been optimized to significantly reduce the delay of sound and image, making the sound more operable and the gaming experience more immersive Specifications: Material: ABS Bluetooth-compatible solution: JL 6973D2 Bluetooth-compatible version: 5.2 Battery capacity: Headphones: 30mAh; Charging Case: 250mAh Usage time: Listen to music for 3-4 hours Charging time: 1.5H Distance: 10 meters Charging interface: Type-C Package included:2 x Bluetooth-compatible Earphones1 x Charging Case1 x Charging Cable1 x English User Manual