Hair Comb is a revolutionary device that incorporates combing and vacuuming to eliminate head lice and eggs. As you comb, it extracts head lice and eggs from the hair into the capture filter. The filter unit is illuminated by a bright LED so you can see what has been removed from the hair. The combing unit features stainless steel teeth with gentle rounded edges and two adjustable combing angles. 1 Securely attach capture filter to v-comb combing head, ensuring it clips into place (until you hear a click) and re-attach the combing head to the main body by aligning the guiding arrows and twist to lock. 2 Hold and push down the knobs on both sides to manually adjust the combing angle. Two set positions are available: straight or raking position. 3 Brush hair to remove knots and separate into sections using hair clips. Ensure V-comb is right way up and start from the nape of the neck and work your way up, one section at a time. 4 Section the hair no wider than the teeth and comb close to the scalp. Comb through each section several times and in all directions (top, bottom, left and right). 5 after treatment is complete, immediately remove capture filter from the V-Comb and replace lid before discarding. Clean comb using the brush provided.