Marathon Red Laser Pointer Black. Approx. 5.5 length x 0.5 diameter (inches). 650 nm wavelength. 9000 feet maximum range (less in daylight). < 5.0 mW power output (Class IIIa laser product). Constant wave output mode. Uses 2 AAA batteries (included). Specifications for Marathon Red Laser Pointer: Manufacturer: Marathon Color: Black Beam Color: Red Laser Output: 5 mW Wavelength: 650 nm Maximum Range: 9000 ft Battery Type: AAA Battery Quantity: 2 Length: 5.5 in Included Accessories: 2-AAA Batteries Width: 0.5 in Package Contents: Marathon Red Laser Pointer Marathon EL888019-RD: Red Laser Pointer Black