Uses a single AA battery, not included. Aluminum Construction with anodized finish. Super-Bright Red Laser pointer in the middle of 7 Bright White LEDs. Click-on button operation, click once for laser, then off, then again for LEDs, then off, repeat as necessary. Includes black nylon strap.

Size: 4.5" long x 1" head diameter, 2 ounces (11.43cm x 2.54cm, 56.7 gm)

WOW!! The laser is REALLY bright, both dogs and cats will chase it around on the ground. MUCH better than the cheap laser pointers that use the button batteries, and it stays on without holding the button. The laser is easily visible over 1/2 mile distance.