GalaRing G1 Smart Ring, High-end Fashion, Waterproof & Dustproof, Suitable for Android Smartphone with NFC Function (black(size L:20.5mm)) Brand & Model: GalaRing G1 Type: NFC Smart Ring Material: titanium steel + high quality cowhide Suitable for most of phones modles IP68 professional level: dustproof level 6, waterproof 50 metres, resistance to dropping 5 metres