FOUND IN A OLD CLOSED DOWN GARAGE. HAVE NEVER TESTED IT DUE TO THE FACT THAT I DON'T KNOW WHAT IS POSITIVE OR WHAT IS GROUND NOR DO IO HAVE A 6 VOLT POWER SOURCE. I BELIEVE IT IS A 6 VOLT HORN BUT I AM NOT SURE. BEING SOLD AS IS. PLEASE VIEW PICTURES FOR CONDITION ETC.