Others have brought up 2FA. I've been looking for a simple (RSA SecurID FOB style) display device that only provides OTP codes. Does such a thing exist? I'm not

Others have brought up 2FA. I've been looking for a simple (RSA SecurID FOB style) display device that only provides OTP codes. Does such a thing exist? I'm not even above buying a dozen of those old FOBs if it gets the job done