to trade away or sell items instantly you'll need: a steam guard mobile authenticator enabled on your account for at least 7 days. otherwise, to give you time to discover and stop items from leaving your account if your account is compromised, items will be held by steam for up to 15 days.

Write the above sentence using proper case.
To trade away or sell items instantly you'll need: a Steam Guard Mobile Authenticator enabled on your account for at least 7 days. Otherwise, to give you time to discover and stop items from leaving your account if your account is compromised, items will be held by Steam for up to 15 days.