Quantity: one Widely used in electrical and electronic circuits in homes, laboratories, factories and offices Easy and clear readings with manual or range changes automatic DC current: measuring range 0~5A; accuracy 2.5%; DC voltage: measuring range 0~2500V; sensitivity 20K/V; accuracy 0-1000V 2.5% 2500V 5% AC voltage: measuring range 0~2500 V; 4K/V sensitivity; accuracy 5%; frequency range; DC transistor amplification 0~300 hFE Audio level: measuring range -10~+22dB; size: 165 x 112 x 49mm Notes on the use of the table: (1) Before using the multimeter, the mechanical zero adjustment must be set =' first be performed, that is, when there is no electricity to be measured, point the multimeter pointer to the zero voltage or zero current position. (2) When using the multimeter, do not touch the metal part of the test pen with your hands, which can ensure the measurement accuracy on the one hand and personal safety on the other hand On the other hand. (3) When measuring a certain amount of electricity, it is not possible to change speed during measurement, especially when measuring If high voltage or current occurs, greater attention should be paid. Otherwise, the multimeter will be damaged. If you need to change speeds, you must first disconnect the test leads, and then proceed to measurement after changing speeds. (4) When the multimeter is used, it should be placed horizontally to avoid errors. At the same time, be careful to avoid the influence of external magnetic field on the multimeter. (5) After the multimeter is used, the transfer switch should be placed in the higher gear of the voltage alternative. If it is not used for a long time, the battery inside the multimeter should also be removed to prevent the battery from corroding other devices in the multimeter. Tip: Due to the special structure of the pointer head, strong vibration or falling from a high place may cause the head to fail. There is a big deviation in the data. It can basically be judged that the head spiral spring or voice coil has blown. There is a way to fix most of these faults. The specific method is as follows: place one or two thick books on the table, then hold down Hold the lower part of the meter, turn the meter face down or face up, and press the table a few times difficult to reset the hairspring. You can change the counter to several additional angles and tap it, then observe whether the counter pointer has returned to the zero position. , Please pay attention to the striking force, it will be ineffective if it is too light, but be careful not to break the glass. Good quality product