1. Baseus self-developed BISA atmospheric audio technology (Baseus Immersive Spatial Acoustics): Based on the HRTF (head-related transfer function) for human ears, drastically improves the sense of direction coming towards the ears and the spatial immersion of the sound field by re-rendering the auditory algorithm of the stereo sound. 2. A maximum of 70 hours of audio playback time is done with all settings in neutral and the volume at 70% playing SBC format audio in the Baseus laboratory. The actual playback time may vary due to different volumes, music formats or function settings. 3. All data provided by the Baseus laboratory, the actual performance may vary in different scenario settings. 4. Baseus self-developed DCLL technology (Dual Channel Low-Latency): DCLL can control the latency within 60ms, down to 38ms. Upgraded chip makes the real timing in sync with the audio data, ensuring simultaneous low-latency audio transmission and stability for both channels. 5. Baseus self-developed BSC technology (Baseus Smart-Connect): During Smart-Connect, when one of the two connected devices has an incoming call, the earphones will automatically switch to it for you to answer or reject, no need to manually switch to it. 6. Type-C to 3.5mm headphone jack for wired connection(when the headphone is powered on). 7. (1) For location function, scan the QR code on the user manual to download the Baseus app and pair your headphones when Bluetooth and GPS are both on. (2) App will show the headphone connectivity and battery status.