... information,call,send&receive SMS,etc. Working with RS vehicle tracking system / vehicle tracker / avlDisplay Resolution128*64LCD Duty1/65Bias1/9 biasvisual ... adderss and port, hotline, Lock the door by speed/brake,auto-arm when turn off the engine and read the version ... mainframes firmware,SN of mainframe.10) Mainframes interface Test. vehicle tracking device-Handset for RS AVL