This premium quality ruggedized key chain laser pointer is virtually indestructable with a durable hardened casing built to last for years as opposed to common novelty key chain laser pointers. Constructed of thick solid durable brass with matte silver scratch resistant finish with key ring & locking swivel clasp. 650nm/Class IIIA, 500 Yards, 5X brighter than 670nm laser pointers laser pointers. Momentary on/off switch. Dimensions (L x W): 2 11/16" x 9/16". Wavelength/Range: 650nm/500 yds. Power: <5mW. Weight: 2.5 oz. / 3.8 oz. in box. Batteries: 3 x LR-44 cells (included; paked with equipment) Window gift box. 1 Year Warranty, (3) LR44 batteries included.