This dimming controller can connect multiple units in parallel. One switch can achieve dimming from 0% to 100%, enabling synchronization and individual lamp control. As this dimming controller is passive, no external voltage is required. The dimming signal operates on a 0-10V voltage range, with no power wattage limitation. The product has a compact design, strong compatibility, and provides a flicker-free and jitter-free dimming experience. Dimmer switches are widely used with various lighting types including growth lights, track lights, spotlights, downlights, ceiling lights, panel lights, wall washers, and other compatible lighting systems. Easy to wire: Brown connects to positive, blue connects to negative. Compatible with 0-1 to 10V dimming signal drivers; do not connect directly to AC power. To synchronize multiple dimmers in series: Set all dimming controller switches in the group to the ON position, adjust all 0-10V dimmer knobs to the maximum value, then use any dimmer in the group to control the brightness of all connected units simultaneously. Color: Black Material: ABS Package Contents: 1 x LED dimmer switch Only the above package content is included; other items are not included. Note: Lighting and different displays may cause slight variations in color compared to the actual item. Measurement allows an error of +/- 1-3 cm.