The Trimmer Fine Print How to Use 1. Easily connect the two parts of the Trimmer with the blade side facing up and press the cutters back until it clicks. 2. The Trimmer comes with two adjustable guide combs. Choose a comb to achieve your preferred hair length. 3. We recommend replacing your Trimmer blade every 3 to 4 months, depending on usage. waterproof sensitive shaver tech 6,000 Strokes/min. Why You’ll Love It • Ceramic blades reduce scratching and tugging. • Features a low vibration mode for enhanced comfort. • Adjustable guide combs let you trim to your perfect length.