Turning on the cleaning mode with adjustable sensitivity (you need to set it to zero), the twist is small, you need to take off your gloves, but I just can't remember which way to turn it, the previous mask 615 from Tecmen, despite the fact that the younger model was more convenient - there the twist was one placed on the side of the mask - dimming adjustment and it switched to the stripping mode with a noticeable click. To tell you the truth, I have no idea why you have to make all of the adjustments on the side of the mask. You can't alter anything in the glove, and you still have to take off the mask in order to set something that is understandable. If it were up to me, the button would be removed in order to activate the stripping, and then everything would be fine. Simply a large one, so that even when wearing gloves you can press or turn it. I would want to have such a fantastic mask, however instead of having a 3.5 din open mode, it should have a 2.5 din open mode like the model that the 800 series has. Everything is generally visible in principle when the weather is sunny or when the lighting is a standard 3.5 din, but when there is heavy shadow present, when it is nighttime, or when there are garage conditions, there are already problems, and you need to highlight it.