This tester is designed to have no serviceable parts and is maintenance free. Periodically wipe the tester with a soft damp cloth and mild household cleaner. Do not use abrasives of solvens. Ensure that no water gets inside the equipment to prevent possible shorts and damage.
The instrument complies with CAT III 1000.
·Voltage Range: 50 - 1000VAC
·Frequency range: 50 - 500Hz
·Bright LED and audible alarm sound if voltage is present