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
🔌 Klein Tools NCVT2PKIT: Dual Range Non-Contact Voltage and Receptacle Tester for Versatile Applications
9 Review
1AC-A1-II Fluke 💡 VoltAlert Non-Contact Voltage Tester
12 Review
Neoteck Voltage Tester/Non Contact Voltage Tester 12-1000V/48-1000V Adjustable Sensitivity AC Voltage Detector Tester Pen Live/Null Wire Tester With LCD Display Buzzer Alarm Wire Breakpoint Finder
27 Review
KAIWEETS Voltage Tester: Non-Contact And Contact Pen For 12V-300V NCV Testing, LCD Display, Live/Null Wire Detection, Buzzer Alarm, And Wire Breakpoint Finder - VT500
20 Review
💡 Hydrofarm Quantum QT400 Dimmable Ballast for 400W Grow Lights
5 Review
Fulham WorkHorse WH2-120-C Adaptable Ballast - 2 Pack
3 Review
💡 High-Quality Advance ICN-4P32-SC Electronic Fluorescent Ballast: Ideal for 4 Lamps, 32W T8, 120/277V
3 Review
Wireless Electronic Ballast Interface Certified
8 Review