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. 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, safeguarding 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. Over 4,0