Place tip of device on magnetic surface and press the button to show polarity of magnets: Red shows North and Green shows South with audible buzzer. Gauss sensitivity is 150 minimum. Includes 4 AA batteries (1.5 volts).
Place tip of device on magnetic surface and press the button to show polarity of magnets: Red shows North and Green shows South with audible buzzer. Gauss sensitivity is 150 minimum.
Includes 4 AA batteries (1.5 volts).