When for Es/for CAS/for EZS/for Ez5 and other models with chips cannot , the tester can quickly diagnose whether the lock does not , whether it is the problem of reading , and quickly diagnose the quality within 10 seconds. Intelligent operation, no need to connect to a computer. At the same time, it is a powerful assistant for car electronic maintenance personnel and car locksmiths. Instructions for use: 1. Place the induction coil on the front of the ignition switch. 2. Pass the induction loop, insert the key into the ignition switch, turn on the key, and the induction loop work. 3. The induction loop converts the electromagnetic communication between the key chip and the anti-theft computer into a flashing LED light to let us know the working status of the chip anti-theft system. 4. A. If the induction map does not flash, it means that the anti-theft computer or coil is broken (the anti-theft computer has no signal) B. If the induction ring flashes for a long time, it means that the chip is not suitable for this car, and the anti-theft is activated. (The anti-theft coil searches for the key chip, but it can't be found) C. If the induction loop flashes once, it goes out, indicating that the key chip passes and the anti-theft is released. (The anti-theft coil can find the key chip in one click) Colour:Photo Color Material:ABS Package Contents: 10 x Detection Card Device Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.