1.[Open Ear Comfort]- True Open-ear bone conduction headphone, no ear blockage from sweat, comfortable fit. Weighing only 0.99 oz, crafted with a 0.7mm flexible memory Ti-alloy frame and skin-friendly silicone for the rear bridge, ensuring continuous optimal shape. Balanced weight distribution for all-day ultimate comfort without hindering sunglasses wear. Soft, skin-friendly silicone cushions on the front of the ears guarantee a gentle touch and high fit, with no allergies or discomfort. 2.[Sound for Sport]- True Bone conduction sport headphone, equipped with a 16mm BC acoustic driver, delivers powerful and authentic audio. SoundBeam directional sound field technology ensures clear audio transmission without any leakage, guarding personal privacy. With built-in audio power amplifier, featuring EEE Tech and exclusive ResoRich Tech, it significantly cleans EMI(Electromagnetic Interference), enhances sound quality, elevating overall auditory experience. 3.[Over 4,000 Songs Storage]- True bone conduction headphone boasts a generous 32GB built-in storage space. Utilize the magnetic data & charging cable to connect with a computer and store over 4000 high-quality songs. Even without carrying a phone, customers can effortlessly enjoy music during workouts. 4.[Prolonged Power for Workouts]This open-ear sport headphone lets you enjoy extended music sessions. Just 2 hours of charging provides up to 8 hours of music, catering to your long workout sessions. Additionally, a quick 5-minute charge half an hour of playback, ensuring you can quickly get back into the groove after short breaks. 5.[IP68 For Every Weather]- Whether you're conquering outdoor runs, engaging in intense workouts, or embarking on journeys through unpredictable weather, this headphone, equipped with an IP68 waterproof rating, stands as your ideal choice. Its meticulously sealed design and nano-hydrophobic coating effectively prevent sweat and rain from penetrating, ensuring the internal components remain undamaged.