How do I set up the tracker to send SMS alerts when the vehicle exceeds a speed limit?

Send the SMS command 'speed+password+space+080' to the unit (replacing 080 with your desired speed in km/h), and it will reply 'speed OK!'. When the vehicle exceeds that speed, the tracker sends 'speed+080!+latitude & longitude' to authorized numbers, with a maximum of one SMS per 3 minutes, and the siren will beep once each time overspeed is detected. To cancel, send 'nospeed+password'; note that the recommended minimum speed setting is 30km/h for accuracy.