This mini GSM/GPRS/GPS tracker is designed to help track the old, kids, pets, valuable items or monitor the surroundings conveniently. All you need to do is to insert a SIM card and send some short commands from your smartphone. You'll be able to get accurate locations of the tracker and hear the sounds within 10 meters/98 feet of the tracker, plus you'll get alerted once the sound reaches 45dB when the tracker automatically calls the number you've authorized as you like. Helps tracks the old, kids, pets, or valuable items like aircraft model Locates by texting that includes whereabouts and a link to map plus battery level Allows phone number authorization Emergent SOS function with a simple button Monitors the surroundings by sending back the sounds within rangeOption to automatically recall the authorized number when it detects a 45dB sound within rangeAble to work with app for more convenient uses Charges via included USB cableCharging input - AC 100-220V 50/60 HzCharging output - 5V 500mAConnection - GSM/GPRSGSM Frequency - 850/900/1800/1900MhzDetection range - 10 meters/98 feet System compatibility - Android and IOS Battery - 3.7V 500mAh rechargeable li-ion battery Size - 3.1×4.2×1.2 cm/1.22"×1.65"×0.47" (L×W×H) Weight - 17g/0.6ozPackage size - 9.2×16.4×3.6 cm/3.62"×6.46"×1.42" (L×W×H) Package weight - 65g/2.32oz1×Real Time Portable Mini GMS/GPS/GPRS Tracker1×USB Charging Cable1×User Manual