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| PartNumber | NR-25994-000 | NR-25994-D42 | NR-25994-C97 |
| Description | Microphones 4.0 X 5.59 X 2.28MM -49 SENS, JA/JK PORT | Microphones Noise Canceling MICROPHONE | Microphones Noise Canceling MICROPHONE |
| Manufacturer | Knowles | Knowles | Knowles |
| Product Category | Microphones | Microphones | Microphones |
| RoHS | Y | Y | - |
| Directional Properties | Noise Cancelling | - | - |
| Impedance | 4.4 kOhms | - | - |
| Current Rating | 50 uA | - | - |
| Sensitivity | - 49 dBA | - | - |
| Termination Style | Solder Pad | - | - |
| IP Rating | - | - | - |
| Length | 5.56 mm | - | - |
| Width | 3.99 mm | - | - |
| Depth | 2.26 mm | - | - |
| Operating Supply Voltage | 10 V | - | - |
| Frequency | 4 kHz | - | - |
| Packaging | Bulk | - | - |
| Series | NR | NR | - |
| Brand | Knowles | Knowles | - |
| Length in | 0.219 in | - | - |
| Length mm | 5.56 mm | - | - |
| Product Type | Microphones | Microphones | - |
| Factory Pack Quantity | 1 | 25 | - |
| Subcategory | Audio Devices | Audio Devices | - |
| Width in | 0.157 in | - | - |
| Width mm | 3.99 mm | - | - |