Designed to allow piggyback connection of Lighting Effects Simulators (sold separately) and boost individual channel output up to 200mA each. Can be used with any well-regulated 9-18 volt DC power source. Example: 514-N8032 Beacon Simulator is for 1 LED. With 18-volt supply and single-channel booster connected, it can drive up to 90 LED Beacons all varying in brightness just like the single unit. These Boosters also work very well with Super Flashers (sold separately).WARNING: This product can expose you to chemicals including LEAD, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov