Documentation issue status
| Version | Comment | 
|---|---|
| 4.2 | 
 | 
| 4.1 | 
 | 
| 4.0 | 
 | 
Firmware (FW) and hardware (HW) versions
| Documen- | KL4001, KS4001 | KL4002, KS4002 | KL4004, KS4004 | |||
|---|---|---|---|---|---|---|
| FW | HW | FW | HW | FW | HW | |
| 4.2 | 3D | 09 | 3D | 09 | 3D | 05 | 
| 4.0 | 3D | 08 | 3D | 08 | 3D | 04 | 
The firmware and hardware versions (delivery state) can be found in the serial number printed on the side of the terminal.
Syntax of the serial number
| Structure of the serial number: WW YY FF HH WW - week of production (calendar week) | Example with serial number 35 04 1B 01: 35 - week of production 35 |