This monitor is junk. It doesnt work and when you have an event it take the thing 20 minutes to respond to your pushing the buttons. 20 minutes. No one lets you know anything about the event. I ran out of connectors and called they said 2 days well day 9 and guess what i dont have. Called because i know its not recording right the person on the line had a thick Speech impediment. Said he could understand me. Im 15th Generation american and belong to debate teams as well as teach esol so my English is spot on. This thing is constantly acting very wierd one lead was off but it never read it as off when all are on you have to change them several times so it reads them on. Just a waste. My Diagnosis depends on this machine but doesn't work. If your doctors suggested begged them to give you anything else do not use this piece of trash you could die of a heart attack and it would never record anything