Coslus C20 and C41 2-in-1 Oral Kit: Electric toothbrush + water flosser. 0.3mm dual jets and 42k brush strokes for full-mouth clean. 3 flosser modes, 4 brush modes. Lasts 30–45 days, Usb fast charge, <450g. 300ml Bpa-free tank-ideal for braces, travel, family.