I have the uni one in the link it’s pretty good, also one of these which I use more Fluke T6-600 Electrical Tester - https://www.test-meter.co.uk/fluke-t6-600-electrical-tester?utm_source=google_shopping&gad_source=1&gclid=EAIaIQobChMI1J7Mxq7UhQMVZptQBh3syQ-XEAQYBCABEgJn5fD_BwE also one of these...