This .270 wsm Sightmark laser bore sight comes with batteries and a carrying case with the Quality sightmark red laser
wave length 632-650 nm
class III a
Batteries 3xAG3 included ,can use 2x AG5
Battery life <1hr continuous use
Sighting Range 15-100 yds
dot size 2" @100yds
Simply chamber the boresight like your regular round.