The usage indicator will help to remind you when it’s time to change your blade
Fits all One Blade handles
Rechargeable One Blade can trim, edge, and shave any length of hair.2 blades last up to 8 months (for best experience. Based on 2 full shaves per week. Actual results may vary).Fits all OneBlade handles (QP2520, QP2530, QP6510, QP6520)