High-Resolution Audio & LDAC Codec - DLC diaphragm, Tesla magnetic circuit architecture, and Cadence HiFi 5 DSP independent decoding earphone amplifier module are seamlessly integrated into these TWS earbuds to complish HiFi sound quality, delivering expansive dynamics and rich details, which provides users with an immersive and detailed soundstage that captures the essence of every musical nuance. These earbuds also support the LDAC codec, and the transfer rate is three times more than SBC.Hybrid ANC & 4 Goer Mics - Featured hybrid active noise cancellation that reduces noise by up to 45 dB, in frequency range of 3000 Hz, EARFREE-i3 will always help you enter your private world. 4 Goer mics with Neural Network Noise Reduction Algorithm accurately reduce environmental noise while picking up human voices.50H Battery & 54ms Game Mode - Up to 50 hours of extended battery life, these headphones can get an 80% recharge in just 30 minutes, which is a perfect farewell to battery anxiety. Game Mode has a seamless 54ms latency, allowing smooth experience of various FPS and rhythm games.Bluetooth 5.3 & Dual-device connectivity - Built with Bluetooth 5.3 chip, EARFREE-i3 also supports dual-device connectivity. You can effortlessly manage two devices simultaneously, allowing for flexible transitions between multiple devices and achieving a perfect balance between work and entertainment. Whether you're in the office or relaxing, enjoy the convenience and efficiency of a digital lifestyle anytime, anywhere.Comfortable Fit & Customized Controls - The ergonomic design based on 7000+ pieces of data provides a stable and comfortable wearing experience even for a long time. The ROSELINK App supports customizable manipulation for device control and offers HIFI/POP/ROCK EQ for different music vibes.