Ignore the first three characters, and look at the next two to get the "band". Refer to the chart on the left to find out what frequencies the device covers.
HW (Hardware) code
The hardware code contains some useful information if you want to find out more about a specific terminal.
The two main areas of concern are the frequency coverage and the encryption that the device supports.
On handhelds. remove the battery and you should find a sticker with the Hardware Code. On mobiles, the sticker will be located on the main unit.
The HW code will look like this on an SRH3800 on TW band: PSGTW001T400100
The 6th and 7th digits tell you about the encryption.
00 = Clear (No encryption).
01 = TEA1
02 = TEA2 (Probably a missing Airwave set. AVOID!)
03 = TEA3