The buzzer icon of a multimeter is generally: a diode symbol, with another symbol similar to wireless, or a music symbol.
A buzzer that makes a sound when you put two pens together. It is called that it is through, such as a wire, the quantity of both ends will be called, this wire is good, the quantity of the diode is called, indicating that the diode is broken, the transistor capacitance and so on are the same. Inductance, except for transformers, which means that a buzzer can measure whether a wire is open or not, and can also measure the quality of many components, not the smallest level of electrical resistance.(at the edge of the capacitor, it is called, indicating that the capacitor is charging and discharging. Normal. The capacitor can not be tested by a multimeter alone
Ohm, similar to the young phonograph pattern, also has a diode gear.
Ohm, the speaker pattern is the same as the buzzer, it is usually used to detect the connection of the line. When in use, you can use this gear to measure, if the device makes a sound, saying that the line is open, if there is no sound, it means that the line is disconnected.
It's a measure of resistance, in ohms