Keep Track GPS EV07 User Manual page 13

Deep Sleeping Mode (3)
3.
Command: DS1 or DS1,xxM/H
Both GSM and GPS chip will be off to save power, the device is unable to receive calls or SMS.
It can be only activated by movement. Once movement is detected, it will run for the set time and sleep again if no movement is detected.
Battery can last 40 days if no movement at all.
To turn off this function, send DS0
4. Working mode (4)
Command: Mode4
In this working mode, device can always receive SMS, calls. But GPS chip only wakes up and updates location to the tracking platform if user press button or receive phone
call/text message.
Without press button or phone call/text message, GPS chip will always sleep.
5. Time interval working mode (5)
Command: Mode5,xxS/M/H
Example: Mode5,10M
Device will update location to the tracking platform every 10 minutes.
In this working mode, the device can always receive SMS, calls. And it updates location to the tracking platform according to the time you set.
User Guide