DetailsThis 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