Insulated handle for safe testing Safe, insulated grip protects you during testing of electrical components such as plugs, ignition coils, and circuit breakers. The design minimizes the risk of shocks while you work. Clear visibility for confident diagnostics brightness bulbs combined with a transparent observation window let you easily observe test results, reducing guesswork and speeding up diagnostics. Improved accuracy with a grooved contact end The grooved end enlarges the contact area with wires and instruments, helping deliver more reliable and accurate test readings. Cordless and portable No cables to manage and a compact, lightweight design make it easy to carry and use anywhere, from the workshop to the roadside. Essential tool for automotive inspection and maintenance A practical, reliable instrument for automotive electrical testing, suitable for professional shops, DIY enthusiasts, and field technicians. 23 practical use scenarios Invehicle ignition system checks: quickly test spark plug connections and ignition coils during routine maintenance or fault diagnosis. Electrical wiring and circuit testing: verify connectivity and operation of connectors, circuits, and circuit breakers in automotive electrical systems. Field service and roadside diagnostics: perform fast, onsite electrical checks on cars, motorcycles, or light trucks without needing extra cables or equipment. Key attributes at a glance Function: testing plugs, ignition coils, and circuit breakers with safety and accuracy in mind Compatibility: suitable for automotive electrical components and related testing tasks Size and portability: compact, lightweight, cordless design for easy transport and use in tight spaces Material and construction: insulated handle for safe, durable handling during electrical testing Performance: bright indicators and a clear observation window provide quick, dependable results without complex setup