Here is a list of the supported model(s):
A6G Series (43A6G, 50A6G, 55A6G, 65A6G, 70A6G, 43E6G, 50E6G, 65E6G)
S6E series (65S6E, 58S6E)
*Requires Internet connection.
If you wish to know how to use the Hulu app, please refer to this help article: [Hisense TV] How does Hulu work?