1Application: CAS test platform is compatible with multiple system modules, including CAS1, CAS2, CAS3, CAS3+, CAS3++, replacement for E chassis all models. 2Function: CAS programmer test platform can quickly check if the CAS module and key are working, no need to connect the car, easy to use. 3LED Light On: After the power is turned on, the LED light of the CAS test platform is always on, indicating that the CPU FLASH data is lost. It is recommended that you write the FLASH data of the models in the same year. 4LED Light Off: After the power is turned on, the LED light of the CAS test platform is off, indicating that the CPU FLASH data is locked caused by the unstable programmer when writing data, the EEPROM data needs to be edited. 5Durable Material: Auto key programmer platform is made of premium ABS material, high temperature resistant, sturdy and durable, long service life.