| Code | Description |
 | OBRF2G4 | External 2.4 GHz radio module, cable l=3m. ABS IP65 protecting box, 3 m cable, power supply from weight indicator. Max. distance, in appropriate environmental and installation conditions: 45 m indoors, 140m outdoors. 39 configurable channels. |
 | OBRF2G4-USB | External 2.4 GHz radio frequency module, USB cable l=1m. Power supply directly from the USB port. Max. functioning distance, in appropriate environmental and installation conditions: 45 m indoors, 140 outdoors. 39 configurable channels. |
 | OBRF2G4-232 | 2,4GHz radio module for PC with ABS IP65 case and l=3m cable. Fitted with DB9 connector and external power supply. Max. functioning distance, in appropriate environmental and installation conditions: 45m indoor, 140m outdoor. 39 configurable channels. |