This is a Quad 20" lightbar, you can mount it in the window (for inside use) The lightbar has 9 ft wire from light to cig plug. Theres an on/off switch on the ciggarette adapter. This lightbar has 10 flash patterns, you can change flash pattterns by pushing the button on the back of the light. The size of the light- 17"length x 2"wdth x 2 1/2" ht.4 Lights, Each with Hi-Power LED 8 LEDs per light. The lightbar comes with 2 suction cup brackets