For metering own gun would be necessary. Otherwise, the dosage is difficult, as I had to learn, unfortunately. I mean, gets a little too much glue. Well, the phone has meanwhile's survived. A type specification is missing from the product description, I should not have ignored this. I was delivered a TP-1000N. (Incidentally, there is a Youtube video showing the different types) of departures (and mitgehärtete) adhesive remained soft and tacky in my case. Hope that the nail polish UV lamp was sufficient. An indication of what is required for a UV light, I could not find also. The display is in any case clear and excellent touch.