Dual-Port Efficiency Compare Two Cylinders Instantly --- Test two spark plugs side by side to compare spark intensity and timing in real time. Weak cylinders stand out immediately, bling faster and more accurate diagnosis. Mechanics can complete more jobs in less time, while DIYers get clear, visual confirmation without confusion or extra tools.
Safety First Fully Enclosed Spark-Proof Design --- High-voltage sparks can be dangerous. KS40s fully enclosed transparent cover activates only when securely locked, preventing accidental electric shocks while allowing you to observe spark behavior clearly. Safe for beginners and professionals alikework confidently with full protection every time.
Universal 12V Compatibility Plug, Lock & Test --- Compatible with all 12V GASOLINE engines in cars, motorcycles, ATVs, UTVs, boats, and lawn equipment. Simply insert the plugs, close the lid, and power upno setup, adapters, or tools required. With 100240V AC input, KS40 is always ready for quick, safe, and precise spark plug diagnostics anywhere.