Takes AAAx2 (included) The 1 Watt headlight is silver (not black) and has a steady option and 2 flashing options. No tools are needed for installation and AAA batteries are included. The taillight has a very strong .5 watt LED in the center and regular LEDs on the sides. It has 2 options: Steady .5 watt on. Or flashing all 3 LEDs. Comes with AAA batteries.