Thank you for your enquiry.
Regarding serial number formats:
For the PT300 the serial number should be found in the battery compartment and be in the following format xxx-xxxx
For the PATGuard 2 the serial number is found in the inside lid of the software box and is 6 blocks of 5 digits, for example:
Unfortunately, we no longer offer technical support for PATGuard 2 without a valid support contract, please see the link below: