1. This electric head massager has three kneading modes: wake-up mode - fast combing and stimulating acupuncture points; relaxation mode - gentle kneading to promote scalp microcirculation; sleep preparation mode - alternating between fast and slow to relieve tension and promote deep sleep. 2. This hair growth comb is equipped with microcurrent teeth and has three adjustable intensity levels - level 1 (red), level 2 (blue) and level 3 (green) to stimulate the scalp through kneading action. The scalp relaxation massager slides along the meridians to open pressure points, relieve head pressure, strengthen hair , and stabilize hair density. 3. This scalp relaxation massager has multiple round comb teeth that can deeply knead the scalp for thicker and fuller hair. Combined with 660nm red LED therapy, it activates hair follicles, promotes the absorption of hair serum, balances scalp oil secretion, and effectively fights hair loss. 4. The electric kneading massage comb can promote blood circulation, tighten the scalp, and target multiple problems. Product name: Multifunctional massage comb Product size: about 24 x 9 x 3cm Power: 5W Input voltage 5V 1A Working voltage 3.7V 0.2A Lithium battery: 3.7V 1200mAh Charging time: 3 hours Specifications: A Ordinary type Color: As Shown Material: ABS+POM+Silicone Package Contents: 1 * Massager 1 * Charging cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.