A straight forward genuine replacement - colour coded leads, just follow the connections shown on case of unit.You may find it simpler to cut the large ring connector from the yellow cable and connect it to the existing yellow cable with a simple cable connector.

This item has been imported from the original manufacturer in China.

Do not do what I did originally - bought a universal replacement, only to find it was only suitable for 110V (USA Market)

A simple DIY job- made easier with the 4 way mini plug and socket kit (included) as shown in the pictures.  Although a little bigger than the HYTEC HY unit, it is also  capable of  handling more powerful lamps. A wiring diagram to show the connections for each dimmer switch identified, is included. Can also be used with LED lamps.

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I also have 2 only Westek 120V 60Hz units (E72217B) at the same price.