The Stamina Training Unit (STU) replicates the incredible sensation of sexual intercourse. Training with the STU helps with premature ejaculation and performance anxiety, and helps users achieve mind-blowing orgasms. Exclusive Gold Fleshlight case. Vagina orifice. Rear cap can be loosened or tightened to modify suction during use. Pack includes shower mount, 8 oz. of water-based lube and an e-guide for increasing stamina.