1Applicable Models: Auto key programmer emulator is replacement for Benz W202 W203 W208 W210 W211 W639, suitable for various models.2Main Function: ESL simulator is a replica circuit board, can be used to solve problems related to ESL electronic corner locks in car models.3Automatic Programming: The circuit board can be programmed automatically, and the code value can be automatically learned by rotating the key, so as to complete the matching of the key.4Simple to Operate: The ESL simulator is very easy to use, just follow the instructions to connect and complete, no tedious configuration and setup process.5High Toughness Material: The circuit board is made of ABS plastic material, compact, portable and can work stably for a long time.