Providing an alternative that's hand cranked: https://www.amazon.com/Vixen-Horns-130dB-Manual-VXS-1200M/dp/B0106ZE4UA
Vixen Horns Loud Heavy Duty Base Mount Hand/Manual Crank Alarm/Siren (Air Raid) VXS-1200M https://www.amazon.com/dp/B0106ZE4UA/ref=cm_sw_r_other_apa_i_ADFWEb4CP49JK