| Model | ER 31/EM 31/EL 31 (Handheld + Lapel) |
| Receiver | Dual Channel Non-Diversity |
| Frequency response | 50Hz – 15 KHz |
| Polar Pattern (Hand & Lapel mic) | Cardioid |
| Output | Unbalanced ¼” Jack |
| Power Req. (Hand & Lapel mic) | 9 V Alkaline Battery |
| Receiver | 240V AC 50Hz for AC Adaptor Supplied with the set |
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