1. [Instantly upgrade your wired HiFi headphones to wireless headphones] Turn your favorite wired HiFi headphones into wireless headphones with the KZ-AN01 Bluetooth module. Experience high-resolution audio with support for LDAC (up to 990kbps) for true lossless sound quality that surpasses traditional wireless headphones. 2. [Advanced ANC and 4-microphone noise reduction technology for clear calls] AI-driven active noise reduction (ANC) blocks out distractions for an immersive listening experience. Need to stay alert? Switch to transparency mode to hear the sounds of your surroundings. The 4-microphone system ensures clear calls even in noisy environments. 3. [Ultra-low latency game mode for real-time audio synchronization] The lightning-fast 50 millisecond low latency mode takes your gaming experience to the next level and achieves perfect audio-visual synchronization. Seamlessly switch between standard, active noise reduction, transparency, and game modes to optimize your listening experience in any situation. 4. [40 hours of playtime and Bluetooth 5.4 stability] Get up to 8 hours of continuous playtime on a single charge, and a total of 40 hours of playtime with the 400mAh charging case. Bluetooth 5.4 ensures faster pairing, stronger connection performance, and wide compatibility with your devices Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store