1. Pull blue protective sleeve off the Light & Go.
2. Screw off the lens from the Light & Go. Pull the top case from the bottom case from the front of the case.
3. Install the batteries as indicated on the bottom case.
4. Put the top and bottom case back together. Align the three holes in the reflector with the three LED bulbs and screw the reflector back onto the case. Put the protective sleeve back on the Light & Go.