White Calls/Music In-ear Headset True Wireless Stereo (TWS) USB connectivity Bluetooth 5.3 10 m Intraaural Earbuds 20 - 40000 Hz 32107 dB Microphone type: Built-in -38 dB Lithium-Ion (Li-Ion) 43 mAh Natural listeningTaken from nature, the treble area is more natural and durableThe world's only application of bamboo fiber to the dome of micro-speakers. Compared with Enco Air2 Pro's titanium-plated diaphragm, the internal damping of the CBF material is greater (experimental video comparison: the CBF material is dropped for 3 seconds, and the titanium plate is dropped for 8 seconds), and the listening experience is softer.Through the developed front cavity customization kit, the sound cavity layout is optimized, and the sound of bamboo fiber is clearer.Hi-Res Wireless Audio certification+ LDAC Hi-Res modeSound quality beyond CD level, the hallmark of high-end audio equipment The earbuds are Hi-Res Audio Wireless certified, featuring dynamic drivers with a frequency response of over 40