Function: 1,positioning function: GPS satellite + BeiDou satellite + Wifi + AGPS + base station -- dual-star positioning, more accurate positioning. 2,Two-way call: three buttons can dial three different numbers. 3,Receiving mode: In APP--Contacts, you can set different call modes. 4,History View: save the device running track within 90 days. 5,alarm function: virtual electronic fence, set the range of the area, more than this range can be alarmed. Subject to a certain intensity of vibration alarm, low battery alarm. Electricity-saving function: ultra-long standby, simple operation. wifi function: new wifi locator, to solve the indoor, underground shopping malls, etc., no satellite signal can not be located. Mobile 4G full network pass CAT1: LTE-FDD: B1/B3/B5/B8 , LTE-TDD: B34/B38/B39/B40/B41 Color: Blue Material: ABS+PC Package Contents: 2 x GPS locator 2 x charging cable 2 x lanyard 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.