Safe isolation kit consisting of the Socket & See VIP150 Voltage Indicator and the Test Mate Proving Unit. Used by electricians and engineers to safely verify circuits before carrying out electrical work. The proving unit allows you to confirm the voltage tester is working correctly both before and after testing a circuit. Includes: • Socket & See VIP150 two-pole voltage indicator • Test Mate proving unit Condition: Very good, tully working. Ideal for electricians, apprentices, or engineers.