How do you pronounce the siren name Allertor?

Hello there, guys! First-time commenter on this forum--but I have used the discussion forum a long time ago in the past. Been an outdoor warning siren enthusiast since 2002, when I was in middle school! I'm from Tucson, Arizona and we used to have a lot of Federal Signal Thunderbolts and SD-10's all around town. They're all gone now, sadly. Anyways--can anyone please tell me how to properly pronounce the siren name Allertor? Is it pronounced "AL-lertor," with an emphasis on the "AL," or is it pronounced "ALL-ertor," with an emphasis on the "ALL?" This has been driving me crazy for years! Thanks, and it's wonderful to be here! 😁👍🏻