--- Easy connection, detachable every 3 LEDs. The datachable point is marked by a black line on the PCB. After cutting, both parts can still work independently under 12V DC power, and can still be joined together by wires and snap-in connectors. --- Only parallel connection is allowed. --- Easily can be connected by cable connector in series end by end. --- Available colors: Red, Greem, Blue, Yellow, White.. --- Each unit includes 30 LEDs.