Field Guardian Digital Voltmeter Touch the short probe at the top of the meter to the charger post or wire to get a voltage reading Comes with black pouch for storage. Operates off a 9 volt battery Range is from 0.01 - 9.9KV (10 - 9,900 volts) Packaged 1 per pack Main color is Black Touch the short probe at the top of the meter to the charger post or wire to get a voltage reading Comes with black pouch for storage. operates off a 9 volt battery Range is from 0.01-9.9kv (10-9,900 volts) Packaged 1 per pack Main color is black