Uses 3 AAA batteries, not included. Aluminum Construction with anodized finish. Super-Bright Red Laser pointer in the middle. Outer ring of 10 Bright White LEDs, plus inner ring of 5 UV LEDs. Click-on button operation, click once for laser, then off, then again for White LEDs, then off, then again for UV LEDs, then off, repeat as necessary. Includes black nylon strap.