This is a gen3 day/night scope, you turn a wheel on the side and it is a 5x day scope, which makes zeroing easy, and then when the light drops you turn the wheel back and it is a gen 3 night scope, it was over £3700 when new about 10 years ago, it has a built in i.r. and I have never needed an addon as the built in one has been great out to over 200yds, I dont shoot beyond about 100yds at night even with my new thermal, it was mainly used for foxes but a few bunnies got in the way occasionally! bargain price and postage to u.k. included, Ukraine is possible for extra cost!!