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Technical data |
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| Impedance at the 1000 Hz frequency , no less kOhm | 2,7-5 | |
| Level of the sound pressure of the calling signal developed by the calling device conjointly with the resonance chamber dB at the supplied voltage of 10 V, at no less a frequency than 1100-2500 Hz:, dB. | 75 | |
| Dimensions, mm | Æ37,5x8,6 | |
| Weight, kg | 0,01 | |
