Product Name: GPS Watch Tracker for Elederly Kids RF-V38 GPS Lbs WiFi Tracking Waterproof Voice Monitor S0s Button Two-Way Talk on Google Map (avp031V38) Model NO.: avp031v38 Warranty: 1 Year Certification: RoHS, FCC, CE Use: Automotive Screen Size: <1" Trademark: ate Transport Package: Box Specification: 100/box Origin: China HS Code: 8526911000 Product Description GPS Watch Tracker for Elederly Kids RF-V38 GPS LBS WiFi Tracking Waterproof Voice Monitor S0S button Two-way Talk on Google Map1. Our this RF-V38GPS tracker can only work with 2G GSM network,it does not support 3G 4G or 5G network.If your 3G 4G SIM CARD can also support 2G network, then it is ok to use.But if your country have closed 2G network,We suggest you choose our 3G 4G GPS GSM tracker.2.Our this GPS tracker need to use a sim card, the package has no include any simcard,please buy the sim card from your local market.TheMainFunction:1.44'color touch screen (screen resolution 240*240)Waterproof: IP67GPS+WIFI+LBS Real-time trackingHistorical route playbackGeo-fenceSOS alarm & push-button callingVibrate on Ring for incoming callTwo-way audio communicationLow battery & SIM card changing alarmMainFeature:1.Positioningmode:GPS+AGPS+LBS+WiFi+inertiaMulti-modeprecisepositioning2.Sportsstep3.Stylishwaterproofwatchappearance4.420mAhsafetypolymerbatterywithstrongbatterylife,withsensors,intelligentpowersaving,sleeppowersavingdesignatrest5.Multipleworkingmodes:fastpositioning,standardpositioning,powersavingpositioning6.Multi-platformmonitoring:supportAndroid,Applesystemmobilephoneandcomputernetworkclient7.Global:GSM850/900/1800/1900MHzProductSpecification:IDstyle:simpleatmosphere,exquisiteandcompactProtectionlevel:IP67Color:gold,blue,blackLanguagesupport:SimplifiedChinese,English,Button:twobuttons(SOSforhelp,powerbutton)Screen:1.44-inchtouchscreenGPSantenna:highsensitivityceramicactiveantennaGSMantenna:FPCantennaBattery:420mAhSIMcard:MicroSIMcardGravitysensor:supportI/Ointerface:USBmagneticchargingProductsize(approx.):57*39*16mm(watch)254*39*16mm(withstrap)