· Includes two replaceable blades· Two blades lasts up to 8 months (Based on 2 full shaves per week; actual results may vary)· 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)