It's a decent IR scope, for this price. Not intuitive at all for the use of the control keys. The owner manual is ok, if you understand english or chinese, you'll safe. Have to learn how to use when it's daylight. The target setting is like the rest of this scope not intuitive, but I've managed to make it. It's a shame the batery can't be removed to be replaced on field. Autonomie during cold night is about 4h maxi with the IR light on.