LIBO Smart Home Access Control Power Supply K80 Power Switch DC 12V 3A AC 110~260V for All Types Access Control System Door Lock with Time Delay

Easy to install and works perfect

I purchased two of these, and will return both of them. Connected to 121VAC for input power and on the relay COM terminal. Connected a 150mA resistive load to the N.O. contact. (Relay coil). As soon as the input power is energized, the output fires, even without any control wires connected to this unit. At 121VAC input power, I had 105VAC showing on my N.O. terminal, and the load relay pulled in, which is no good for my system. The same thing happened with both units. I'd say some serious QC issues. The first unit arced to the metal enclosure when I moved the box slighty.

Both of the AC wires exiting the device were red so it is impossible to tell without opening it which one is the hot and which one is the neutral. This is a major issue and I'm really surprised it passed inspection.