1.Bone conduction technology delivers music through your cheekbones, ensuring ears remain completely open to hear ambient sounds 2.Open ear can protect your hearing and also friendly for weak hearing people 3.Durable neckband with premium material can 360° bending without deformation 4.Special design to match with diving glasses avoid drop off 5.IPX8 waterproof with built-in 32GB memory card for swimming and diving 6.Liquid silicone encapsulated body(except control part) for long time wearing comfortably 7.With ENC