Home Hardware
Di-LOG 690V AC Proving Unit Safety Checking of Voltage Indicators Compact Proving Unit for Safe Isolation
690V AC Output to prove voltage for 2 pole testers High/Low Impedance for proving voltage on multimeters CAT II 750V Safety Rating Low Battery Indication Supplied with batteries
https://www.bizrate.co.uk/homehardware/di-log-690v-ac-proving-unit-oid37364245824.html