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| PartNumber | EK-28585-C77 | EK-28586-C37 | EK-28585-C37 |
| Description | Microphones 5.56 X 3.98 X 2.21MM -53 SENS, 0KP PORT | Microphones 5.56 X 3.98 X 2.21MM -53 SENS, 12S PORT | Microphones 5.56 X 3.98 X 2.21MM -53 SENS, 0KP PORT |
| Manufacturer | Knowles | Knowles | Knowles |
| Product Category | Microphones | Microphones | Microphones |
| RoHS | Y | Y | Y |
| Directional Properties | Omnidirectional | Omnidirectional | Omnidirectional |
| Impedance | 4.4 kOhms | 4.4 kOhms | 4.4 kOhms |
| Current Rating | 50 uA | 50 uA | 50 uA |
| Sensitivity | - 53 dBA | - 53 dBA | - 53 dBA |
| Termination Style | Solder Pad | Solder Pad | Solder Pad |
| IP Rating | - | - | - |
| Length | 5.56 mm | 5.56 mm | 5.56 mm |
| Width | 3.98 mm | 3.98 mm | 3.98 mm |
| Depth | 2.21 mm | 2.21 mm | 2.21 mm |
| Operating Supply Voltage | 1.3 V | 1.3 V | 1.3 V |
| Dimensions | 5.56 mm x 3.98 mm x 2.21 mm | 5.56 mm x 3.98 mm x 2.21 mm | 5.56 mm x 3.98 mm x 2.21 mm |
| Frequency | 5.3 kHz | 4.5 kHz | 5.3 kHz |
| Packaging | Bulk | Bulk | Bulk |
| Series | EK/EY | EK/EY | EK/EY |
| Brand | Knowles | Knowles | Knowles |
| Length in | 0.219 in | 0.219 in | 0.219 in |
| Length mm | 5.56 mm | 5.56 mm | 5.56 mm |
| Product Type | Microphones | Microphones | Microphones |
| Factory Pack Quantity | 1 | 1 | 1 |
| Subcategory | Audio Devices | Audio Devices | Audio Devices |
| Width in | 0.157 in | 0.157 in | 0.157 in |
| Width mm | 3.98 mm | 3.98 mm | 3.98 mm |