KZ AZ09 IEM Bluetooth Adapter,Bluetooth 5.4 Ear-Hook Module | Wireless Waterproof, Long Battery Life Cable for KZ Castor Pro/ZS10 PRO/X/2, ZSN Pro/X, AS16 PRO, Zax,ZAR, CRA/C12(C pin)

[Free Switch Between Wired and Wireless] - This Bluetooth module is specifically designed for earphones with 0.75 mm / 0.78 mm pins, instantly converting wired headphones into wireless ones and freeing you from cables. It enables you to switch between wired and wireless modes based on different scenario requirements while preserving the original headphone sound quality.
(Note: This product is a Bluetooth upgrade earhook only and does not include earphones. ) [High-Fidelity Sound] - Utilizing Bluetooth 5.4 technology, this module delivers an exceptional audio experience with faster transmission speeds and stronger connection stability. AAC advanced audio coding technology significantly enhances audio quality for natural and clear sound. [Long Playback Time] - Each earbud provides up to 6 hours of playback per single charge. The 400mAh charging case supports 4 full recharges for both earbuds, offering up to 30 hours of continuous music playback. Enjoy music all day, even when you're out. [Double Host & High-Performance Game Mode] - Featuring dual-channel transmission instead of a conventional single host, this design reduces latency. Each earhook can be used independently. The high-performance mode provides faster audio transmission speeds for gaming. [Lightweight & One-Key Operation] - The Bluetooth earhook weighs only 4.5 g, offering a lightweight and pressure-free feel for a comfortable wearing experience. Each earhook has one multi-functional button for receiving calls, playing/pausing music, and switching tracks, making operation easy and simple