IPL Hair Removal Device (Model: KCA423, KCA437, KCA439), is an over-the-counter, home-use and single-person-use device for hair reduction by using Intense Pulsed Light (IPL). It works below the skin's surface and does not involve any cutting or pulling, reducing hair growth with minimal pain. The device is only powered by the external power adapter and its IPL emission activation is by finger switch. This product adopts irreplaceable flash window and is suitable for multiple hair removal areas (such as: underarms, bikini lines, arms, legs, etc.). It contains a skin proximity sensor to detect appropriate skin contact; if the device is not in full contact with the skin, the device cannot emit the treatment light pulses. Models KCA437 and KCA439 have skin tone sensor to identify user's skin tone. Only users with suitable skin tone can use this device. IPL Hair Removal Device, model: KCA423, KCA437, KCA439 have the same indication for use, performance, structure design and operation; the only differences are appearance, capacitor and whether it's equipped with skin tone sensor (KCA437 and KCA439 have skin tone sensor while KCA423 does not).