| Model | SC-305 |
| Dimension: | 3*5*7mm |
| Max volume output 3KHz: | 93 |
| General volume output 1KHz: | 73 |
| Frequency: | 300Hz-5KHz |
| Distortion rate: | <2% |
| S/N at 2KHz: | >50dB |
| Receiving system: | Electromagnetism receiving |
| Model of zinc battery: | 416 |
| Battery Longevity: | 15 hrs |
| Weight including battery: | 0.8g |
Covert Earpiece
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