Red laser dot suit for darklight or indoor, visual range up to 300yard Wavelength: 630-680mm Max Output: < 5mW Color: black Length: 155mm Head Dia: 16mm Tail Dia: 5mm Weight: 29g If you find the bore sighter not straight in the barrel, please note :The caliber adapter can expands larger as your turn it into laser bore sighter Package included: 1 x Laser Bore 1 x Screwdriver 1 x Installation Stick 4 x Adjustable Adapters 2 x AG13 Batteries 1 x User Manual