Giant bars of LEDs light up sequentially as this arrow appears to move! Absolutely amazing visual effect using 63 LEDs and a variable speed control. Great as an attention getter, people director or use 2 kits as an auto directional signal (check local laws). Kit comes with 9V battery snap but will also operate on any voltage between 5V and 12V AC or DC. Optional AC adapter is available (C6401). Size of board: 5 1/2" x 4". Complete with all parts, PC board and instructions. Skill Level 2. This kit requires soldering of components to the PC board while building. Arrow with Red LEDS.