User manuals are sorted by product serial number and model codes. The first 4 digits of the serial number represent the manufacture date (YYMM) eg, 2203-XXXX = March 2022 build date.
Models: TLR-145-1-GD/SD, TLR-200-1-GD/SD, TLR-520-1-GD/SD, TLR-750-2-GD/SD
TLR-950-2-GD/SD, TLR-1500-3-GD/SD
October 2023 - current (2310 - current)
Models: TR-160-SP-1-SD, TR-260-SP-1-SD, TRF-DUAL-SP
October 2023 - current (2310 - current)