The first case should an electronic transformer my old bathroom lights (formerly 4x MR11-Leutchtmittel with 4x20W) replaced. The old electronic transformer did work with the LED Leutchtmitteln, these have but flickered. Because of the small size it was no problem to install the new transformer in the ceiling behind the Leutchtmittel. Now there is no more flickering!
In the second case I have installed this LED transformer in a spot lamp that had a conventional transformer for old 2x 35W spots that I have exchanged for LED spots. Also there functioned the LED lamps with the old transformer, this has but hummed audibly. Here was after the expansion of the old transformers plenty of space for the little LED transformer ... no hum. Super!
From any radio interference or other problems I have not noticed. Am fully satisfied on these parts!
Connecting was no problem. 4 terminals are labeled well sichbtbar ... you can not go wrong! And the price is great!