The TD4-72 4-Step Touch Dimmer by Tresco controls 12-volt lighting and is compatible with the ELT60-CON transformer.The touch dimmer accommodates up to 3 transformers or fixtures that plug directly into the dimmer. Three transformers control up to (18) 10W lights or (9) 20W lights. The touch dimmer includes an On/Off switch, a 7' power cord, a touch pad and a touch dimmer unit. The touch dimmer must be installed prior to using the ELT60-CON transformer. Other accessories are also available (each item sold separately). The TS2-72 Touch Controller comes with an On/Off switch & dimmer unit with a 3-plug receptacle (200W max). A 6' quick-disconnect touch cord with pad also comes with the controller. Each item ships via UPS/FedEx Ground.