This is great if you want to swap this add on to different rifles, it comes with all available attachment, it is easy to zero only taking 1 shot, you then freeze the picture and move the cross hair in the add on to the shot hole and its that easy, I now have a dedicated thermal scope fitted to my fox rifle and i havent used this for over a year, it doesnt like rechargeable batteries as they only last about 20mins!, I used a small power bank which never seemed to run out of a night if fully charged before use, I will include the in the sale too! just click it on your zeroed rifle, you do not have to adjust your rifle to use this, this menu button on the top has split slightly through use but it works fine price includes postage to a U.K. address (Ukraine will be extra) I would like to add this can also be used as a spotter but the rear lens is missing!! it is fine when fitted to a scope though!