Yep, dedicated looks as if the Yukon RT, addon then it’s the Addonight or the many rebadged derivatives. Both amply good enough at air rifle ranges for not much money really. You can spend 10 times more but no need to or you can make your own for less than £150. Others on here will have a variety of units but the Yukon is proven and the addonight will do the job rather well if your scope is compatible with nv.