Can be used with AA 1.5V batteries and 6F22 9V batteries.
But it seems that old watches also have 15V batteries. Open it and look at the high-voltage battery connector. The one on one side is 9V, and the one on both ends may be 15V. It may be marked inside. Without a 15V battery, the highest resistance setting cannot be used, which does not affect other aspects.
Multimeters are also called multiplex meters, multimeters, three-purpose meters, multi-purpose meters, etc. They are indispensable measuring instruments in power electronics and other departments. They are generally used to measure voltage, current and resistance. Multimeters are divided into analog multimeters and digital multimeters according to their display modes.