With the internal magnet, the hidden camera can be adsorbed on any iron surface. Perfect as surveillance camera in Office, Home Car, etc. One camera can support multiple users and one app can support multiple cameras simultaneously. This spy camera features hotspots so it can record without Wi-Fi too: just insert an SD card and turn it on, and the mini WiFi camera will auto-record HD video files to an sd card; It can also record videos even if the network is offline Question: Is this magnetic? Does it need the holster to stay or can you use it without it? Does the wire need to be plug-in for it to work? This mini spy camera comes with a built-in high-quality rechargeable lithium-ion battery. Besides, you can get the camera plugged into a USB charger to have it stay on continuously. You’ll have peace of mind knowing that you can watch over your valuables by live stream at any time.