Using this tab you can do the following:
Adding and Removing "RT Live" units to the system
More information is here.
This section allow you to change the Email address and password associated with your account.
View credits remaing and Purchasing credits
Additional credit can be purchased using this section and can be paid with PayPal.
Click on the Points buttons to add credits and you can reset the Total credits you have entered and start over by clicking the "Reset" link. Once the credits are entered, click on the PayPal button to complete the payment.
Informaton about rates and charges are here.