IMILAB EC2 is a cordless AI security camera that features PIR (Passive Infrared) thermal sensing technology to work entirely by reliably detecting heat-generating moving objects. When someone enters the sensing range (normally 5-14um wavelength), the PIR motion sensor will automatically receive the infrared wave emitted by the human body, which is smart enough to detect humans rather than sheets blowing in the wind. The battery can support the security camera to operate for 120 days on one single charge. It can be easily unfixed to recharge, or you can even charge it with a power bank directly.