Infant Optics DXR-8 Add-on Camera (Not Compatible with DXR-8 PRO) CAMERA ONLY Additional Camera Unit pairs with Infant Optics DXR-8 (3.5" model) Features remote pan/tilt/zoom, night vision, remote thermometer. Number of channels: 1 frequency channel Expand up to 4 camera units per monitor unit Used but great condition! I do have 2 separate posting — 2 cameras for sale. This is for 1 camera.