Colour: Black Input voltage: 6V DC

Battery: 4 * 1.5V AAA (without battery) Red LED wavelength: 660nm +/- 5nm Blue LED wavelength: 470nm +/- 5nm  Output: 420mW without vibration 600mW size: 24 * 4 * 4.5cm  Comb size: 23.5 * 7 * 3cm Massage comb size: 6.5 * 2.5 * 2cm  Kit kit: 16.8*10.8*83cm Color box size: 28.5 * 16.5 * 8.5cmFeatures: Hairdressing, scalp massage, promoting hair growth