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| Style | protable |
| Sound pressure level | 110±2 dB(A) @ 1m |
| Audio frequency | 550±20 Hz (depending on the hand-shaking speed) |
| Material | aluminum alloy (in addition to the stand frame) |
| Net weight | 1.2 kg |
| Effective range | 1000 meters in diameter |
| Packing size | 186*186*170 mm |
Compact structure, folding, light weight, easy to carry, strong voice and low frequency. It is widely used in open air camp, civil defense, mountain rescue and seaside guard, , factory enterprise, flood control, fire control, prison, reservoir, ship, mine, plain, ranch, gas station, airport, forest farm, hotel, hotel and other enterprises and other enterprises and institutions.
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| Hand alarm | SY-200L SY-200A SY-200B KG-200A KG-200B LK-100 LK-100A LK-100B LK-100L |
| Temperature alarm | WST702 WST565 5642 |

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