Using the Walksnail Avatar HD Nano Camera V3 is a breeze. First, connect the coaxial cable to your device. You can choose the 90mm default cable or the 140mm one according to your needs. Once connected, power on your device and the camera will start working. For the best image quality, make sure the lighting is not too dim as the minimum illumination it can handle is 0.001Lux. When it comes to maintenance, keep the camera dry and clean. Use a soft cloth to gently wipe the lens if it gets dirty. Avoid dropping or subjecting it to strong impacts. Also, store it in a safe place when not in use to prevent damage.