| PartNumber | CI-28329-000 | CI-28352-000 | CI-28348-000 |
| Description | Speakers & Transducers Balanced Armature Speaker | Speakers & Transducers Balanced Armature Speaker | Speakers & Transducers Balanced Armature Speaker |
| Manufacturer | Knowles | Knowles | Knowles |
| Product Category | Speakers & Transducers | Speakers & Transducers | Speakers & Transducers |
| RoHS | Y | Y | Y |
| Product | Receivers | Receivers | Receivers |
| Type | Acoustic | Acoustic | Acoustic |
| Frequency | 5.5 kHz | 5.5 kHz | - |
| Sound Pressure Level | 128 dBA | 128 dBA | 125 dBA |
| Impedance | 175 Ohms | 68 Ohms | 1 kOhms |
| Termination Style | Solder Pad | Solder Pad | Solder Pad |
| Length | 9.47 mm | 9.47 mm | 9.47 mm |
| Width | 7.18 mm | 7.18 mm | 7.18 mm |
| Depth | 4.1 mm | 4.1 mm | 4.1 mm |
| IP Rating | - | - | - |
| Packaging | Bulk | Bulk | Bulk |
| Series | CI | CI | CI |
| Brand | Knowles | Knowles | Knowles |
| Length in | 0.373 in | 0.373 in | 0.373 in |
| Length mm | 9.47 mm | 9.47 mm | 9.47 mm |
| Product Type | Speakers & Transducers | Speakers & Transducers | Speakers & Transducers |
| Factory Pack Quantity | 25 | 25 | 1 |
| Subcategory | Audio Devices | Audio Devices | Audio Devices |
| Width in | 0.283 in | 0.283 in | 0.283 in |
| Width mm | 7.18 mm | 7.18 mm | 7.18 mm |
| Shape | - | Rectangular | - |