When you use this Car Key Master, you will have to input one password, the password is calculated according to your code.
This password is required every time when you use this device, it is not very well, here are two ways you can get the password:
1. Once it asks you to caculate the password, please contact us, send us the code (for example, 88C665A7 as the picture shows), we will caculate the password for you.
2. As you need to send us the code every time, if you don't want to do like this every time and want to save your time, you can buy one ESL Database with 32G.