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Beware of accuracy vs. resolution vs. number of digits in your display. Cheap DMMs may have 4-1/2 digits but an accuracy of ±0.5%, making those last two digits pretty much worthless. If the meter has good long-term stability, the extra digits can indicate small changes, but not actual value. As a rule of thumb, it takes a 3-1/2 digit display to resolve ±0.1%; 4-1/2 digits for ±0.01%, etc. Even the big boys (Fluke, Agilent) are pushing accuracy vs. digits, especially when you move away from the basic DCV and DCA functions.