Marathon Dual Red and Green Laser Pointer Black. Approx. 6 length x 0.5 diameter (inches). laser pointer with red and green laser light (press red button for red laser light press green button for green laser light). momentary button with pocket clip. comes with two AAA batteries. Brass material with black coloured barrel. Operating temperature 15: 35 C. 630nm and 532nm wavelength. constant wave output mode. Power supply: 3 volts total (2xAAA batteries included). Range 9000 feet max (less in daylight). Specifications for Marathon Dual Red and Green Laser Pointer: Manufacturer: Marathon Color: Black Beam Color: Red Green Laser Output: 5 mW Wavelength: 532 nm Maximum Range: 9000 ft Battery Type: AAA Battery Quantity: 2 Length: 6 in Included Accessories: 2-AAA Batteries Fabric/Material: Brass Width: 0.5 in Package Contents: Marathon Dual Red and Green Laser Pointer Marathon EL888023-RG: Dual Red and Green Laser Pointer Black