Smart mini GPS tracker GPRS tracking sos communicator rf-v16 long standby, Quad band app download personal tracker remote monitor protects your loved ones all the way. Rf-v16 GPS real tracker & sos communicator could be extremely helpful to children and the elderly in emergency situations thanks to its easy-to-use emergency responsefunctions features: 1. the super mini GPS tracker, fast positioning, low power consumption chip design, GPS positioning accuracy:, , Android app, apple app, we chat 4. Trajectory playback 5. Geo-fence 6.2 way communication 7. Press for sos help 8.3 modes to answer incoming call push-to-talk / auto-answer / silent monitoring: 10. Low battery alert 11. Change SIM alert 12. Super long-time stand-by, up to 300 hours 13. Host size:40*34*15mm weight:27g 14. Packing size:138*118*46mm weight:190g.