This small, in line, amplifier will deliver up to 4 amps per line to the Red, Green and Blue lines that drive the RGB Strip colors. Normally you can only join 2 Strips together, after that the third strip loses brightness and color. This simple amplifier is designed so that one strip plugs in one end and the following strip into the other end and the power supply into the provided red and Black wires. This enables construction of as many strips as wanted in a row. No doubt someone will fine another, non strip application for this great little amplifier. The amplifier I should mention will amplify single colors simply by joining the negative where it goes with RGB and the Color to the appropriate contact. P.S. I will not charge you $1.00 for each item. $1 should ship several and only if you order a lot will you see any more than 1 dollar of freight. I do not make money on freight