*This is only for the model of EXVAC680S with V-slam navigation system;
*A laptop with wireless function is required;
*It's suggested to shut down the anti-virus program before you download the firmware package, in case the firmware package might be killed by the anti-virus program; 
*Please read and follow up the instructions step by step, it's not possible to revert the firmware back to WEBACK after you transfer it to new  version of Libos APP.