Virtually all gate openers no matter the make or model will function without safety devices. We at Troy’s Fence advise they be installed. Such devices can add expense to your project but from a liability / quality stand point cheaper is not always better! Hopefully the following imformation can serve as both a budget and design guide for your system. Further info can be obtained via internet type in keyword "ul-325". Also be sure to see device pricing at bottom of "gate opener faq's" page, thanks! -Troy