The plug or wiring method should be confirmed before publishing because the page contains conflicting descriptions
When armed
113dB loud alarm to help scare off potential thieves
IP65 waterproof housing for outdoor warning applications
USB audio upload for custom alarm tones
YASONG SLA-1501 120dB Power Outage & Power Recovered Alarm Siren, IP65, LED Strobe, Rechargeable Battery Product Size:19.4 × 15 × 32.5cm The plug or wiring methodThe YASONG SLA 1501 power outage alarm siren combines a 120dB adjustable horn, LED strobe warning light and built in rechargeable lithium battery for farms, fish ponds, banks, substations, telecom rooms, hospitals and security areas. This model supports power failure alarm and power recovered alarm modes, selected by the bottom switch. When a power failure or phase loss occurs, the siren sounds and the LED strobe flashes to provide a clear warning.