The slots on the back are positioned for quick insertion of AA, C and D batteries for a quick test. green and I know the battery is operational. The 1.5V, 9V and 12V settings allow for a quick battery test of most common batteries, including car batteries. The LED backlit screen is really good. Easily switch between AC and DC with the push of a button. It's easy to test resistances. I've had cheap port charge voltmeters on 9v batteries and they didn't last long. Much cheaper and less expensive AA batteries are used for this.
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
Enhanced North American AC Electrical Outlet Receptacle Tester - Klein Tools RT110
9 Review
🔌 Klein Tools NCVT2PKIT: Dual Range Non-Contact Voltage and Receptacle Tester for Versatile Applications
9 Review
Robertson Worldwide ISL432T8HEMV AH 3P20160 120-277V 50-60Hz High Power Factor 4 F32T8 Linear Lamp Fluorescent eBallast
6 Review
Fulham WorkHorse WH2-120-C Adaptable Ballast - 2 Pack
3 Review
💡 Hydrofarm Quantum QT400 Dimmable Ballast for 400W Grow Lights
5 Review
⚡️ Sunpark LC-12014T (1) FC12T9 32W Circline (1) 2D 38W (1) FC16T9 40W Circline (1) FC9T9 30W Circline Lamp Compact Electronic Fluorescent Ballast with Circline Lamp Plug 120V
7 Review