Continuity tester Easy for users with any experience level to start testing circuits. This 12V test light helps verify continuity quickly, making your work more efficient and reliable. Probe tester 12V Penstyle tester with an indicator light provides visual confirmation to help detect circuits and test safely and carefully. Test light with voltage display Features an extendable spring cable for flexible reach across any electrical system. Includes a voltage display for quick, ataglance readings. Car maintenance test pencil digital display Multifunction automotive circuit tester with a digital display. Capable of testing continuity, voltage polarity, checking lights and motors, identifying short circuits, and detecting bad contacts. Suitable as an automotive circuit tester. 23 use scenarios Automotive troubleshooting Use the car maintenance test pencil to verify battery and alternator output, check wiring continuity, test lighting circuits, and locate bad contacts or short circuits in automotive wiring. Home electrical work Use the continuity tester and probe tester to verify wiring continuity in switches and outlets, confirm safe wiring before repairs, and quickly identify open circuits in home electrical installations. 12V system checks and diagnostics Use the 12V test light and extendable spring cable to inspect 12V systems such as radios, alarms, or small industrial devices, testing voltage presence, polarity, and circuit integrity across different components.