Features: ● Remote pickup, remote recording, voice-activated callback, voice-activated recording, high-definition silicon microphone WIFI+LBS+AGPS positioning. Real-time tracking, historical track, vibration burglar alarm, electronic fence, built-in strong magnetic, multiple power-saving modes, low-power alarm , remote switch machine. ● SOS Call for Rescue: In for case of emergency, press the SOS for key, that is, to send a call and information to the guardian for help. Device Loss Can be found by Mobile App. ● Two-way Call: Address Book Number Calls with Users.Class anti-interference mode: set the non-interference for time range through the guardian's mobilephone APP, and shield the incoming calls from the equipment. ● Remote monitoring: a highly sensitive microphone that monitors the surrounding sound in real for time in for case of an emergency.Device shutdown and restart function can be realized by guardian's mobilephone APP. ● Intelligent Power Saving: Turn off/turn on GPS and data upload in for time.Mobile client/micro-messenger/computer service platform, multi-control mode. Specifications: Material:ABS Battery Capacity:5000mAh(G41),2400mAh(G42) Charging Port:USB(G41),Micro USB(G42) Positionning Mode:GPS+AGPS+WIFI+LBS+BDS Specical Feature:Worldwide Use,Maps,APP+Web+SMS Size:Approx.45x80x30mm/1.77x3.15x1.18in(G41),36x63x27mm/1.42x2.48x1.06in(G42) Net Weight:160-220g Package Includes: 1x GPS Tracker note: Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.