and high quality Automatic Time Update: Precise GPS time service and no manual time adjustment is needed. Fence: Designate an area on the map by setting the device as the center point and the alarm be triggered off immediately once the user of the device goes into or out of this area. Multiple Positioning Mode: GPS+ AGPS+LBS+WIFI + TF Card and APP Voice Recorder. Track: The user's specific location can be inquired through the cell phone APP or the computer. Worldwide GSM+GPRS 4-frequency System: 850/900/1800/1900MHz. Colour:As Shown Material:PC+metal Package Contents: 2 x Mini Locator module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.