Lp K6 Gps Tracker Kids Watch for Sos Emergency Children Smart Watch Anti Lost Gsm Phone App Bracelet Wristband Alarm Android (Blue) Smart Phone Watch Children Kid Wristwatch W5 GSM GPRS GPS Locator Tracker Anti-Lost Smartwatch Child Guard for iOS Android Function:Passometer,Fitness Tracker,Sleep Tracker,Message Reminder,Call Reminder,Answer Call Plastic Special Function:Emergency Number Dial Display: 0.96" OLED 128x64-With Optional 0.95" Prodcut does not come with SIM card, Sim card must be purchased seperatley from a GPRS supporting carrier Device works with the SeTracker App, and is registered by scanning in the code on back of watch.