For Trimmer Head Use:

Touch the trimmer head to skin to begin hair removal of longer hair. The purple sensa light guide and the green activation LED will remain on while the unit is in use. Hold the to skin and gently glide the head of the unit along skun in the opposite direction of hair growth at a 45 ° angle ( NOT straight up and down).
Do NOT apply excessive pressure during use to avoid damage to skin or head of unit. Discontinue use if any skin irritation results.

For Microfoil Head Use:

For hair stubble or any short hair not removed by the trimmer head select the Microfoil head. For best results while using the Microfoil Head, hold the unit straight up and down (NOT on a 45 ° angle) and apply moderate pressure, moving the unit back and forth until hair is removed.