Induction Signal Detection Card Wide Compatibility: Designed to work with vehicles equipped with antitheft chip inductor rings, this diagnostic card detects lock rings, key cylinders, and antennas with precision. Inner diameter is 1.7 inches, outer diameter is 2.7 inches, making it suitable for most standard ignition systems that use antitheft technology. Reliable and Durable: Made from wearresistant ABS plastic, it is built to withstand repeated use without deformation or fading. The smooth, rounded edges ensure safe handling, while the sensitivity LED indicator delivers clear, easytoread results during diagnostics. Easy to Use: Place the inductor coil close to the ignition switch, insert the key through the coil, and turn it as you normally would to start the vehicle. If the LED lights up, the antitheft system is functioning correctly. If the LED does not illuminate, this indicates a possible lock ring or antenna fault. Portable and Convenient: Compact and lightweight design makes it easy to carry in pockets, toolkits, or hanging from a lanyard for quick access. The included lanyard allows you to keep the card on hand during inspections or work. Practical Applications: 1. Automotive workshops can quickly verify the functionality of a customer's antitheft ignition system before performing repairs. 2. Car owners can easily check for lock ring and antenna faults after experiencing ignition or starting issues. 3. Mobile mechanics can carry the detection card for efficient, onsite diagnostics without bulky equipment. This induction signal detection card combines compatibility, durability, and convenience, making it a valuable tool for any professional or vehicle owner who needs fast, accurate testing of antitheft ignition systems.