This package includes 2 pieces of this 0-10v dimmer switch for LED lights, giving you for your money. 5-100%, stepless dimming and no flickering or humming. The connected power 0/1-10V interface must have a voltage of 10V for dimming, adjustment range from 1-100%, the maximum load connected to is 10V /45mA, Minimum output connect cable size is 1007 20AWG, giving you precise control over your lighting to create the perfect atmosphere for any occasion. Suitable for all 0-10V electrical adjustment, plant lamp dimming, down lamp, track lamp, wall washing lamp, LED lamp, etc. Careful to connect the "+" and "-" as the wiring diagram ( connects to "DIM+", Black line to "DIM-"), this dimmer switch knob is easy to install and can be connected to any compatible lighting fixture in seconds. Crafted from durable plastic and metal, this mini controller switch is designed to last, not easy to damage, and can be reused for a long time. The Max. load connected to the driver is 10V/40mA of the dimmer. Designed for 0/1-10V regulating and compatible with all 0/1-10V interface dimmable LED driver or ballasts or . Place the driver from direct heat sources and in well-aired spaces. If the driver is built in, sufficient ventilation must be ensured. Minimum output connect cable size is 1007 20AWG, maximum output cable length is 50 meters. Product name:dimming knob controller Weight:15g/1pc is positive pole ("+"), connect with "DIM+" or "D+" Black line is negative pole ("-"), connect with "DIM-" or "D-" Stepless dimming range 0-100% Max Input Voltage:10V DC Minimum Input voltage:0.5VDC Output Control Current:less than equal 50mA Minimum output connect cable size is 1007 20AWG Maximum output cable length is 50 meters (164ft) WorkingHumidity:20%-90%RH non-condensing Storage Temperature& Humidity: -4- 176/-20-+80, 10%-90% Colour:Black Material:plastic+Metal Size:Total length:30cm/11.8 inches Package Contents: 2 * dimming knob controller Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.