【Test Two Spark Plugs at Once – Faster, Smarter Diagnosis】Why test one at a time? ANCEL SP02 dual-hole spark plug tester lets you compare two plugs side-by-side—instantly revealing weak sparks or misfires. Spot underperforming plugs in seconds and swap them out before they hurt engine performance. Whether you're a seasoned mechanic or a weekend DIYer, this tool helps you tune faster, fix smarter, and keep every cylinder firing strong

【Built to Last—Your Trusted On-the-Go Companion】Slow starts, weak acceleration, or high fuel use? Faulty spark plugs could be the cause. ANCEL SP02 spark plug tester is heat-resistant, impact-proof, and built for tough jobs. Lightweight and portable, it's perfect for quick diagnostics—whether you're in the garage, at the track, or on the go

【Fast Setup, Real Results—Engine Testing Made Easy】No complicated steps, just plug in your spark plug, twist the knob, and you're all set. The adjustable speed dial (0–6000 RPM) lets you fine-tune the simulation to match your car's engine performance. Pro tip: 2000 RPM is already peak spark—so no need to crank it up further

【Fits 99% of Gasoline Engines – One Tool, Endless Options】From cars to motorcycles, lawnmowers to boats—this spark plug tester works on nearly any 12V gasoline engine. Compatible with spark plugs of different heights and sizes, it takes the guesswork out of testing. Just plug and diagnose—fast, easy, accurate

【Test Safely, Every Time—We've Got You Covered】Built with your safety in mind, this spark plug and ignition coil tester features a transparent protective cover that keeps you shielded from accidental sparks while allowing full visibility of test results. Work with confidence, knowing you're protected—every time you test