Water Resistance: Waterproof
Connection: Bluetooth 5.0
Compatibility: IOS & Android system
Materials: 316L stainless steel; Milan Rope；AAA Grade Cubic Zirconia
Size: Sun Bracelet Inner Circumference:maximum 9.84"(250mm);
Moon Bracelet Inner Circumference: Maximum 9.06" (230mm);
USB Charger: 60-min charge; 3-7 days according to your usage