An apparatus for covering an unused wall telephone jack assembly is disclosed, the apparatus additionally hosting one or more items such as a notepad, writing instrument, whiteboard, keys or picture frame. In one embodiment, an apparatus comprises a manipulandum, a rotor in communication with the manipulandum, an actuator in communication with the rotor, and a biasing element disposed between the manipulandum and the rotor. Each reductant injector includes an injector coolant outlet.