The Guardian2 Site Boundary Monitor is designed to help you remain compliant with site emission levels, using remote monitoring and reporting of noise, dust and vibration levels. Powered by mains, solar or battery, the Guardian2 is ideal for any construction noise monitoring and ground vibration, no matter how remote. For further details on solar or battery power options see the solar and battery power section below. Simply plug into the power source and it will begin continuous emission monitoring, it`s that simple!