Galak Electronics AC Traffic Light Controller/Sequencer - 120VAC - Free US Shipping User selectable time delay from 1 seconds to 2 minutes with separate digital control for "YELLOW" light duration Easy to program mode selection with pushbutton control with 16 traffic light sequence modes Solid state switching for silent operation (no clicking mechanical relays) and circuitry to protect from kickback and voltage spikes Compatible with virtually all types of 120VAC traffic lights including incandescent and LED bulbs Small footprint (just 4" x 2") and includes four adhesive standoffs to allow for effortless mounting.