Model  20GA  Quantity  1 piece(s) per pack  Color  Red  Material  Copper  Suitable Gun Type  Suitable for 20GA caliber gun.  Specification  Wavelength: 635~655nm, power <5mW, powered by 3 x AG13 (included)  Other Feature  Water resistant and anti-shock.  Packing List  1 x Gun bore sight     1 x English user manual     6 x AG13 batteries<img src="http://112.74.112.28/down/products/201374/201374_000.jpg" noproxy>