Since I have the brown IPL device, I had to buy more the Aktivierungsgel. Since the device was introduced in Germany, I was excited, at the price of the required gel. 4.99 euros for the two tubes of 100 ml, I think appropriately, especially when you compare the cost of a permanent hair removal at the beautician. That it is 2 tubes in the cardboard, I personally find very convenient for purely hygienic aspects. For me, a successful price / performance ratio.