Received this morning for this lamp dimmer, well packaged with a very rapide.Il delivery has compared to the old one thyristor (The thyristor is a semiconductor electronic switch), with a good sized cooling radiator and a small diode.Les connection terminals are clearly identified, phase, and terre.Le back cover with the three screws to mount it in a good way. Overall, very good product, "up to date" etfacile to rise.