Review on AP-770D TRMS Digital Multimeter: High Precision Tester for NCV Voltage, Current, Resistance, and More by James Hardin

This is a 5 digit handheld multimeter. I won't go into accuracy as it's debatable at this price point. An interesting feature is the yellow cover over the ports, which moves when you turn the mode dial. The manufacturer must have paid a lot of attention to this, because all the common modes are on the right half of the dial and there is also an "off” position. In this left half, the measuring line can remain in the socket. In the positions of the left half, the cover moves, so the red connector must be disconnected; Otherwise the mechanism will be damaged. Again, there is a switch in one of these positions. A problematic feature is the BEEP line feature. Here the instrument will beep when continuity is detected. It starts beeping as soon as the cables are connected, but keeps beeping when they are disconnected. The duration of the "aftermath" seems to depend on how long the connection has been established. But it's annoying. Also, I had a beep, bang! An additional beep sounded. I can reproduce this by running the test over and over again. About once in 30 comes this extra "Splash!" I don't know if I should stop it or not. I often use the continuity clause to test just about anything.