Product Description Experience immersive underwater audio with the REMAX RB S21 bone conduction sports headphones engineered for all aquatic and land workouts. Built with an IPX8 fully sealed one-piece waterproof shell, these earbuds withstand up to 2 meters deep water, making them ideal for swimming, surfing and water sports. No ear plugs block your ear canals, delivering zero pressure comfort for long hours of running, training or swimming without slipping off. Open ear design keeps you aware of surrounding ambient noise for safer outdoor workouts. Crafted with smooth skin friendly silicone, this durable headset is your all season workout companion for swimming, cycling, jogging and daily fitness training. Features IPX8 deep waterproof rating, seamless fully enclosed body supports underwater use up to 2 meters depth for swimming and water sports 28g ultra light air frame construction, zero pressure lightweight fit for long time sports wear High elasticity flexible neck strap, 360 degrees free bending, stable non slip fit during intense movement Fully closed acoustic chamber bone conduction design, premium delicate sound quality with zero sound leakage Open ear structure, preserves ambient sound awareness for safer outdoor training Physical control buttons for convenient music and call operation without touching mobile devices Skin friendly soft silicone material, comfortable all day wear with no ear canal blockage

Product Details and Care Product Details Model: RB S21 Core Technology: Bone Conduction Audio Transmission Waterproof Grade: IPX8 Total Weight: 28 grams Neck Band Material: High elasticity flexible silicone Speaker Design: Fully enclosed acoustic chamber Connection Type: Wireless Bluetooth Applicable Scenarios: Swimming, running, gym training, cycling, daily outdoor sports Maximum Waterproof Depth: 2 meters underwater Care Instructions Rinse the headset with clean fresh water after every swimming session to remove pool chlorine or seawater salt residue Wipe dry completely with soft cloth before storage, do not store while damp Avoid sharp scratches on the silicone frame and acoustic shell to maintain waterproof sealing performance Do not pull or twist the neck band with excessive force to preserve its flexible bending function Keep away from high temperature environments such as direct sunlight and sauna rooms Charge the device only when the headset surface is fully dry to prevent internal water damage Do not disassemble the sealed headset shell manually, this will destroy the IPX8 waterproof structure permanently

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