Stay secure and informed with this GPS Tracker, your go-to solution for effortless monitoring and tracking. Compact and discreet, this tracker is designed to attach easily to any metallic surface thanks to its strong magnetic mount, making it ideal for vehicles, valuables, and even personal use.Warning: Must insert 3G SIM card and TF card before charging. (Not included).How does it work? All you need is a working SIM card (NOT included!) to insert into the device, then you can track and map (with Google Maps) in real time over the Internet. Dial SIM card number, then you can hear voices around this tracker, with no light and no noise, you can monitor and spy what's going on around the tracker silently and secretly. Instructions: 1. Preparation: a SIM/GSM card and a memory card 2. Power on: Open the card cover and insert the SIM/GSM card in the direction indicated, the product will automatically turn on and the red light will flash 4 times, and enter the normal standby state after 30 seconds.Function Instructions:   Black shell, easy to hide, perfect for tracking vehicles, teens, spouses, elderly persons, or assets.With two powerful magnets inside, easy to attach to the vehicle firmly, no extra installation need.   Voice Recording Function: Send text message 555 to SIM card number, it will reply a message “Snd” and start recording, SIM card and TF card are not included.Handheld and vehicle purpose. Used widely for a vehicle, person, and other moving objects tracking.Specifics:Type: Magnetic GPS LocatorMaterial: PlasticSize(approx):35*20*14mmColor: BlackTalk Time: 150 -180 minutesStandby Time: 12 daysWorking Time: 4 - 6 daysExpansion Card: Mini TF cardNetwork: GSM/GPRSGSM Band: 850/900/1800/1900MhzGMS Locating Time: 25 SecondsPower Input: AC 110-220V 50/60HzPower Output: DC5V 300 - 500mABattery Capacity: 3.7V 400mAh Li-ion BatteryWorking Voltage: 3.4 - 4.2V DCStorage Temp.: -40 to 85 celsiusOperation Temp.: -20 to 55 celsiusHumidity: 5%-95% non-condensingWarning: Must insert 3G SIM card before charging. Package included:1*mini tracker1*USB cable1*user manual