... sensor or the alarm host,smart and nice,easy to install, OEM/ODM. 1). DIY, Wireless installation, Easy-to-alarm at ... backup adaptor), one door sensor, one PIR motion detector. two remote control (other sensors unlimited to be added) INSTALLEMENT AND OPERATION ... : First arm this siren by pressing "Lock" button thru the remote controller, when detectors are triggered, the siren can directly receive ...