Open ear design with rotating hooks ensures a secure, customizable fit and all-day comfort. Directional acoustic technology with a unique acoustic structure minimizes sound loss and enhances sound quality. Up to 10 hours of playback time per charge, 40 hours with the case. Built-in dual microphones with AI noise-cancellation technology provide clear hands-free calls. Bluetooth V5.4 for seamless audio streaming and a stable connection. Supports connection with multiple devices, allowing you to switch between two devices simultaneously. Compatible with the EDLFLER ConneX app for additional features: personalization of control settings, multiple sound effects, finding your earbuds, and more. IP55 certified for daily active use.