Samsung Galaxy Ring, Smart ring activity tracker, 18 mAh, Waterproof, IP68 Samsung Galaxy Ring. RAM capacity: 0.000512 GB, ROM capacity: 8 MB. Device type: Smart ring activity tracker, Form factor: Round, Product color: Titanium, Black. Battery life: 7 day(s), Battery capacity: 18 mAh, Charging time: 1.33 h. Weight: 0.0811 oz (2.3 g), Width: 0.276" (7 mm), Thickness: 0.102" (2.6 mm)