Micro-espions work by recording the sounds and images of their environment. They can be designed to record continuously or only when they detect a sound. Micro-spy can be wired, which means they are connected to an external or wireless device, making them easier to hide and move. Wireless micro-espions transmit recordings to an external device via wireless connection, such as Bluetooth or Wi-Fi. Recordings can be stored on an internal memory or on an external device, such as a computer or mobile phone. It is important to respect local privacy and surveillance laws when using a micro-spion.