This dimming controller supports parallel connection of multiple units. One switch can achieve dimming from 0% to 100%, enabling synchronization, as well as individual lamp dimming and switching. The dimming controller is passive and does not require an external power supply. The dimming signal operates on a 0-10V voltage range, with no power wattage limitation. The compact design offers strong compatibility, and the dimming process is smooth without flicker or jitter. The dimmer switch is suitable for various lighting applications including grow lights, track lights, spotlights, downlights, ceiling lights, panel lights, wall washers, and other 0-10V compatible lighting systems. Easy to wire: Connect brown wire to positive and blue wire to negative. Compatible with various 0/1-10V 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 setting, then use any single dimmer in the group to control the brightness of all synchronized units. Color: Black Material: ABS Package Contents: 1 x LED dimmer switch Note: The actual color may vary slightly due to lighting and display differences. Measurement may vary by +/- 1-3 cm.