Core Functions and Features Real-time Positioning and Tracking: By inserting a SIM card to access the mobile network, you can obtain the device's location information in real-time through your mobile phone. Powerful Magnetic Design: The device has a built-in powerful magnet, which can be easily and firmly attached to the chassis of a car or any metal surface without complex installation. Extremely Concealable: Small size, lightweight, and black appearance make it very difficult to detect. Remote Listening: Supports sending commands via mobile phone to automatically call back for environmental monitoring. Recording and Tracking Expansion: Can be used with a dedicated App for track queries. Easy to use and simple to install.