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| Part Number | EF-26708-017 | EF-21943-033 | EF-23094-018 | EF-23168-A17 | EF-21937-033 |
| Manufacturer | Knowles | Knowles | Knowles | Knowles | Knowles |
| Series | EF | - | - | - | * |
| Packaging | Bulk | Bulk | Bulk | Bulk | Bulk |
| Product Status | Active | Active | Active | Active | Active |
| Technology | Magnetic | - | - | - | - |
| Type | Receiver | - | - | - | - |
| Frequency Range | 200 Hz ~ 3.35 kHz | - | - | - | - |
| Frequency - Self Resonant | - | - | - | - | - |
| Impedance | 175 Ohms | - | - | - | - |
| Efficiency - dBA | 127.00 | - | - | - | - |
| Efficiency - Testing | - | - | - | - | - |
| Efficiency - Type | Sensitivity | - | - | - | - |
| Power - Rated | - | - | - | - | - |
| Power - Max | - | - | - | - | - |
| Port Location | Top | - | - | - | - |
| Shape | Rectangular | - | - | - | - |
| Material - Cone | - | - | - | - | - |
| Material - Magnet | - | - | - | - | - |
| Ingress Protection | - | - | - | - | - |
| Ratings | - | - | - | - | - |
| Termination | Solder Pads | - | - | - | - |
| Size / Dimension | 0.310" L x 0.220" W (7.87mm x 5.59mm) | - | - | - | - |
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