This paper mainly is a natural continuation of " On Lupaş-Jain Operators " constructed by Başcanbaz-Tunca et al. (Stud. Univ. Babeş-Bolyai Math. 63(4) (2018), 525-537) to approximate integrable functions on [0, ∞). We first present the weighted uniform approximation and provide a quantitative estimate for integral generalization of Lupaş-Jain operators. We also scrutinize the order of approximation in regards to local approximation results in sense of a classical approach, Peetre's K-functional and Lipschitz class. Then, we prove that given operators can be approximated in terms of the Steklov means (Steklov averages). Lastly, a Voronovskaya-type asymptotic theorem is given