(Free delivery to the nearest office in your state) The Green Laser Light Pointer Pen is a high quality laser pointer that incorporates the latest technology in green laser optics and microelectronics. Use the laser pointer to point to any desired targets, displays or video screens. Useful for presentations, museums, tour guides, stargazing and construction inspection. There is one key to open the laser, use the key to open the key lock in the tail. Contains rechargeable batteries with charger.