This 4 zone RF controller for monochrome dimmer uses wireless technology in the 2.4 GHz band, and is specially developed for the control of Triac and 1-10V RF dimmers without the need to install wiring.It can control several dimmers as long as they use the same RF technology. You can turn the light on/off and adjust the brightness by pressing and turning it.Has an auto-transmission system allowing the signal to be transmitted simultaneously between controllers at a maximum distance of 30 metres between them.an control up to 20 controllers at the same time.Each controller can be controlled by up to 10 RF controllers.It is essential to purchase the Triac RF Universal LED Controller.Guarantee: 3 years guarantee.IP Rating: IP20Dimensions: H 135 x W 11 x L 40mm