Material: ABS plastic + Silicone
Function: 5-level volume adjustment/pure hearing aid mode/Nano coating waterproof and sweat-proof/IPX5 waterproof                  

Material: ABS  Plastic                                        
Functions:  Bluetooth/Hearing aids/Support voice calls                 

OPENEAR Bone Conduction Headphone Material: ABS  Plastic+PC+Titanium Alloy Function: Bluetooth+IPX5+Bone Conduction technique Bluetooth version:  BT V...

OPENEAR Bone Conduction swimming Headphone Material: ABS  Plastic+PC+Titanium Alloy Function: Bluetooth+IP68+Bone Conduction technique+ 8GB Memory mp3...