Marathon Green Laser Pointer Black. 0 length x 0.5 diameter (inches). Momentary button with pocket clip. Comes with two AAA batteries. Green Laser Pointer has a wavelength of 532nm. Laser Pointer has a power output of < 5.0mW (Class IIIa laserproduct) Constant Wave. Laser Pointer power is 3 Volts total. Green Laser Pointer has a range of 9000 feet Max (less in daylight). Specifications for Marathon Green Laser Pointer: Manufacturer: Marathon Color: Black Beam Color: 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 Width: 0.5 in Package Contents: Marathon Green Laser Pointer Marathon EL888017-GR: Green Laser Pointer Black