22" Power-Link light bar comes complete with either a magnetic or hardware mount base. Both the light bar and control pad install with just two wires (12V+ and Ground) from each item. Signals are sent from the included PLC-TX6, 6-button Power-Link control panel, via the vehicles power lines in order activate it and change flash patterns (arrows or strobe), making the light essentially wireless. There are 14 heads with each containing 4 LED's for a total of 56 high intensity LED's. Blue and Green LED's are also available for an additional charge upon request.