Cell format to report StDev range

Hello - I have a sheet with means and standard deviations calculated, but I would like to report the +/- 1, +/- 2 and +/- 3 standard deviations as a range, in this format: x.xxxx - x.xxxx, i.e., if the mean is 0.341 and the SD is 0.0029, I would like to report +/- 1 SD as "0.3381 - 0.3439". The "space hyphen space" between the two numbers would be text, and I think this could be done with cell formatting, but I haven't been able to figure this out.

Thank you.