Designed for convenience, this automotive spark plug tester pen is an indispensable tool for diagnosing ignition issues. Simply connect it to the spark plug wire and observe the indicator to detect faults. Its lightweight design and reliable functionality make it a practical choice for routine engine maintenance and troubleshooting. Features -Color:Black -Material:Plastic -Size:11.80X2.50X2.50cm/4.64X0.98X0.98in -Rapid engine diagnosis: instantly detect spark plug problems to maintain engine performance and ensure safe and efficient vehicle operation -Precision testing technology: high accuracy detection prevents misdiagnosis, saving time on unnecessary spark plug replacements -Portable convenience: this tool empowers car owners to perform spark plug tests independently without professional assistance -Multivehicle compatibility: suitable for a variety of vehicles, including suvs, addressing diverse automotive needs -Easy to read display: digital readout simplifies the testing process, making it accessible for both experienced users and beginners alike Package list: 2 x Spark Plug Tester