[Comfortable Fit & Enhanced Consciousness] - truefree O1 headphones offer a worry-free fit with over-ear hooks, eliminating worries about small ear canals, long-time discomfort and frequent falls. The open ear design allows you to stay connected with your surroundings. Whether you cruise bustling streets or engaging in outdoor activities, you will never miss a precious moment. [Immersive Sound & Powerful Bass] - Enjoy an exceptional audio experience with the truefree O1 headphones equipped with stunning 16.2mm drivers. Large speakers create a spacious sound stage, revealing intricate detail and faithfully reproducing the original sound. Coupled with an advanced bass enhancement algorithm, these headphones deliver enchanting and immersive sound, accentuated by deep, powerful bass. [Four Microphones & Directional Sound Transmission] - With four microphones and advanced ENC noise cancellation technology, the headphones effectively filter ambient noise and provide crystal clear voice during phone calls. Adopt the innovative directional sound transmission technology to eliminate the problem of sound leakage and make sure you can fully immerse yourself in your music, podcasts or calls without disturbing those around you. [Extended Listening Time & Game Mode] - Up to 10 hours of listening time on a single charge with the headphones, and conveniently recharge them with the portable charging case for a total of 45 hours. Whether in sports, travelling or working, these headphones are the perfect companion. Freely enter and exit the game mode with the left earbud. The headset delivers highly synchronized visuals and sound to optimize your gaming experience. [Advanced Bluetooth Technology & Wide Compatibility] - Use the latest chipset with Bluetooth 5.3 to provide stable connection and effective transmission with low latency and consumption. Ensures a seamless connection and delivers highly responsive audio. Wide compatibility allows you to work with most Bluetooth-enabled devices with version 4.0 and above, allowing you to enjoy your audio wirelessly without any limitation.