The JP-DA is a surface-mount door station used with the JP hands-free, color video entry series. The unit mounts to a 1-gang box and is made from sturdy ABS plastic with a clear polycarbonate lens cover. The JP-DA features a color 1/4" CMOS camera, speaker, and mic for communication, an illuminated call button, and a white illumination LED for low light conditions. The JP-4MED is a video master station with a 7" color touchscreen LCD. The JP-4MED offers handset (duplex) and hands-free (VOX) communication. This unit will support up to 4-door stations and 7 sub-masters. All inside stations are equipped with a door release button for the user to allow visitor entry. The PS-242UL is a 24VDC Class II power supply used for Aiphone intercom applications. This power supply is UL and CSA-listed and is designed for indoor use only.