Bluetooth 5.1 Technology The advanced Bluetooth 5.1 technology of the wireless headphones offers excellent compatibility & stability. Enjoy faster connection speeds, experience longer connection distances, hear clearer music, & experience smoother calls. Exceptional headphones bring you to a perfect world. Stereo Headphones The Bluetooth headphones use the latest Bluetooth chip, they are equipped with 10mm film driver & SBC codec, which accurately analyzes the sound details & delivers wonderful notes. The high, medium & low headphones are balanced, giving you an immersive experience. ERGONOMIC SEMI-IN-EAR DESIGN The OD-E3 Bluetooth wireless headphones are extremely comfortable to wear. A single wireless headset weighs only 0.13 ounces. Even after long-term use, it will not cause any inconvenience, allowing you to feel th All Day Listening The headphones can be fully charged in 1.5 hours to play music for up to 4 hours. The USB (Universal Serial Bus)-C portable charging case can be fully charged in