The TC-G158 is Tianchen's basic model and which has be put on market since 2008.It is a hight technology intelligence product.It has an cutting system.intelligent sensor system and automated navigation system.The structure fo the TianChen robot mower has been uniquely designed to ensure maximum safety for all f tis users.It will stop automatically if the charging station is powerless or the virtual wire is loosed or cut.compass function is option.