RouterOS for CHR P-Unlimited software license.

For License Levels explained, refer to: http://wiki.mikrotik.com/wiki/Manual:CHR#CHR_Licensing

CHR Licenses are installed via your MikroTik.com account login - if you don't already have a MikroTik client account, you can create one for free here:

https://mikrotik.com/client/register

After ordering, reply to confirmation email with your mikrotik account login username or write the username detail as comment during checkout process.  License keys are generally issued within a few hours of order payment.