The robocall blocker from 1991 - Promate 702 Telephone Call Screener

A beige box from 1991 which screens your telephone calls by hanging up on anyone who doesn't know your secret code. Unfortunately in my case it hangs up on everyone, regardless if they enter the proper code or not. Nonetheless, this video is the only proof of this device ever existing anywhere on the Internet. Time flow: 0:00 Introduction 1:40 Unboxing & features 3:43 First test 5:54 Direct hookup 6:29 Test mode 7:49 A look inside & repair attempt 10:28 Conclusion #RetroTech #robocalls #telephone