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| PartNumber | EF-27534-000 | EF-27505-000 | EF-27534-017 |
| Description | Speakers & Transducers 7.87 X 5.59 X 4.01MM 126 SENS, 12S PORT | Speakers & Transducers 7.87 X 5.59 X 4.01MM 126 SENS, 12S PORT | Speakers & Transducers RECEIVER |
| Manufacturer | Knowles | Knowles | Knowles |
| Product Category | Speakers & Transducers | Speakers | Speakers |
| RoHS | Y | - | - |
| Product | Receivers | - | Receivers |
| Frequency | 6.3 kHz | - | - |
| Sound Pressure Level | 126.5 dBA | 126.5dB | 126dB |
| Impedance | 110 Ohms | 636 Ohm | 110 Ohm |
| Termination Style | Solder Pad | - | - |
| Length | 7.87 mm | - | - |
| Width | 5.59 mm | - | - |
| Depth | 4.06 mm | - | - |
| IP Rating | - | - | - |
| Packaging | Bulk | - | - |
| Series | EF/FEF | EF | EF |
| Brand | Knowles | - | - |
| Length in | 0.31 in | - | - |
| Length mm | 7.87 mm | - | - |
| Product Type | Speakers & Transducers | - | - |
| Factory Pack Quantity | 25 | - | - |
| Subcategory | Audio Devices | - | - |
| Width in | 0.22 in | - | - |
| Width mm | 5.59 mm | - | - |
| Type | - | Magnetic | Receiver, Magnetic, Balanced Armature |
| Height | - | 4.06mm | - |
| Termination | - | Solder Pads | - |
| Size Dimension | - | 7.87mm L x 5.59mm W | - |
| Frequency Range | - | 200Hz ~ 6.3kHz | 200Hz ~ 6.3kHz |
| Shape | - | Rectangular | - |
| Power Rated | - | - | - |
| Power Max | - | - | - |
| PortLocation | - | Side | - |
| Material Cone | - | - | - |
| Material Magnet | - | - | - |