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/B41Color: BlueMaterial: ABS+PCPackage Contents:2 x GPS locator2 x charging cable2 x lanyardOnly 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.