This dimming controller can connect a number of lamps in parallel. One substitute can notice dimming within the range of 0~100%, synchronizing on and off, and self sufficient dimming and switching of a unmarried lamp. Because this dimming controller is passive, no external voltage is required. The dimming voltage is 0-10V, there's no energy wattage limit, the product is small in size, the compatibility is strong, and the dimming job has no flicker and jitter. Dimmer switch are widely used in every kind of plant development lights, music lights, spotlights, downlights, ceiling lights, panel lights, wall washers and assorted lighting fixtures pairings! Easy to wiring : Brown line connecting "+",Blue line connecting "-";Compatible with diversified 0/1-10V dimming sign drivers ;DO NOT connect it with AC strength directly. How to synchronize a number of dimmers in series : All dimming controller switches of the whole organization are set to the ON position, all 0-10V dimmer knobs of the whole group are adjusted to the maximum value, and any 0-10V dimmer of the whole group can be turned around to adjust the dimming of the whole group of lamps synchronously. color:Black Material:ABS Package Contents: 1 x led dimmer substitute Only the above kit content, assorted item are usually not included. Note: Light shooting and various reveals could cause the colour of the object in the picture a little diverse from the genuine thing. The measurement allowed error is +/- 1-3cm.