
On ali express there are several types of such indicators from 100 to 600 in more expensive ones there are additional functions - they are not needed by non-professionals outside of everyday life - I use for 100there is a flashlight, a sound signal and the LED flashes \ if you show off, buy more expensive and your face will be like Medvedev with an iPhone

💡 AmazonCommercial LCD Display Non-contact Voltage Tester for Working, Double Mould, Flashlight
10 Review

⚡️ Fluke T5600 Electrical Voltage, Continuity, and Current Tester: Accurate and Reliable Electrical Testing Solution
9 Review

Enhanced North American AC Electrical Outlet Receptacle Tester - Klein Tools RT110
9 Review

1AC-A1-II Fluke 💡 VoltAlert Non-Contact Voltage Tester
12 Review

💡 Hydrofarm Quantum QT400 Dimmable Ballast for 400W Grow Lights
5 Review

Wireless Electronic Ballast Interface Certified
8 Review

💡 High-Quality Advance ICN-4P32-SC Electronic Fluorescent Ballast: Ideal for 4 Lamps, 32W T8, 120/277V
3 Review

🔌 Robertson 2P20132 Quik-Pak: 10 Fluorescent eBallasts for 2 F40T12 Linear Lamps, Preheat Rapid Start, 120Vac, 50-60Hz, Normal Ballast Factor, NPF, Model RSW234T12120 /A (Crosses to RSW240T12120 /B)
4 Review