*The biggest function is can test the lock and key's quality without car,there are lock power protection function,built-in(W203 W210 W211 W209 W169)and directional lock ESL function,it can test alone which don't need to open the original car directional lock ESL,connect EIS lock plug in authorized benz key,open the lock EIS,then can distinguish the key and lock's quality;
*Test car lock model:W220，W215，W210，W208，W202，W203，W211，W209，W169，W221，W164，W204，W207，W639 etc,match with all type EIS test connect plugs,connect plug is durable,the selected lock number not insert wrong,operate easy and convenience.
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