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| PartNumber | WR21-U92B-DE1-SF | WR21-U92B-DE1-SB | WR21-U92B-DE1-SH |
| Description | Routers HSPA+ 2 Ethernet RS232 | Routers Transport WR21 | 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 |
| RoHS | - | Y | - |
| Product | - | Cellular Routers | - |
| Frequency | - | 850 MHz, 900 MHz, 1.7 GHz, 1.9 GHz, 2.1 GHz | - |
| Interface Type | - | Ethernet, RS-232/422/485, USB | - |
| Operating Supply Voltage | - | 9 V to 30 V | - |
| Minimum Operating Temperature | - | - 35 C | - |
| Maximum Operating Temperature | - | + 70 C | - |
| Description/Function | - | HSPA + Global | - |
| Dimensions | - | 100 mm x 131 mm x 32 mm | - |