【No hidden charges】 - International SIM included, cannot be removed (the decive can only be used with this SIM card). A monthly fee of $14.99 h is required or as low as $7.08/month for long term prepaid plans（Paid automatically, all features included - Cancel anytime）. Search "Tracker One" on Google Play or APP Store to download the APP. 【6000mAh Rechargeable Battery&Strong Magnetic 】- The S20 has a built-in 6000mAh rechargeable battery. It can continue to send positioning data to the platform terminal after power off.Easy to install in some metal thing with strong magnetic. 【Geo-fencing Smart Alerts&Track Thieves】--Set up a Geo-fence alert to get a real-time notification alert if you enters or exits an Geo-fence area. Receive SOS, over speeding alert, vehicle malfunction diagnosis,fuel detection,trace playback via App notification, SMS or email. Maintain surveillance over your vehicles, receiving alerts when your car is on the move.It can meet the needs of relevant scenarios such as car monitoring, car-hailing, and car rental. 【Over-Speed Alarm&Light Sensor & Disassemble Alarm】when your speed is over what you set, it will send alarm to remind you keep safe.Send alarm notification when someone remove the device. 【Low Power Alarm&Low Power Consumption】Power consumption in microampere level,when device is in low power, send message to tell you charge it in time.The terminal can meet the needs of scenarios related to car monitoring, car-hailing, car rental, and cargo logistics transportation