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Steel and aluminum labels - with or without adhesive - that
-Weather resistant surface allows the adhesive to stay strong even under heavy rain
Min/Max/Avg/Dif Functions: Displays the minimum
Peak Value Measurement；5、Low Battery Indication
Compatible devices
Manual hand operated siren , Air Raid Hand Crank Loud Alarm (LK120) Red & Yellow Steel and aluminum labels -This is a portable, no power required siren designed for emergency signaling. Model: LK 120 Sound Rating: 1202 dB(A) @ 1M Sound Type: Continuous Output Frequency: 60020Hz (dependent on rotation speed) Effective Range: 1500M 2000M Material: Aluminum alloy Weight: 8KG 9KG Features: No power supply required, foldable, portable, hand cranke Details: Security Alarms Are batteries needed to power the product or is this product a battery: No Is this a