| PartNumber | WR21-U92B-DE1-SF | WR21-U92B-DE1-SL | WR21-U92B-DE1-SH |
| Description | Routers HSPA+ 2 Ethernet RS232 | Routers HSPA+ 2 Ethernet RS232 | Routers HSPA+ 2 Ethernet RS232 |
| Manufacturer | Digi International | Digi International | Digi International |
| Product Category | Routers | Routers | Routers |
| Series | WR21 | WR21 | WR21 |
| Brand | Digi International | Digi International | Digi International |
| Product Type | Routers | Routers | Routers |
| Factory Pack Quantity | 1 | 1 | - |
| Subcategory | Ethernet & Communication Modules | Ethernet & Communication Modules | Ethernet & Communication Modules |
| Tradename | TransPort | TransPort | TransPort |
| Unit Weight | 1.080 lbs | 1.080 lbs | 1.080 lbs |