GPS watch tracker tk203 in Shenzhen Xexun is the newest GPS watch tracker in the market.It is with GPS and LBS tracking and can track only with one SIM card. There is
SOS button on this tracker. If the user presses SOS button, the tracker will call to all authorized numbers one by one. The tracker will send SOS messages with the
latest position if all of the authorized numbers don’t pick up the phone. This function is very suitable for the employees who have to work each day. They can know
the position for their kids and parents in the working time.