Begonia highgloss

This is a magnificent shrub like Begonia with deep green glossy leaves red on reverse. It also has red stems. I suspect it has the potential to reach 2m in height, mine is regularly pruned for cuttings so not so tall.The habit of this shrub is very upright so its not a spreader. Highgloss was outside all winter here with no apparent problems so seems to be a cold hardy cultivar.