HDMI video switcher unit with amplifier, Intercom interface transparent jointer, Adaptor or network interface card tester, Intercom interface female connectors, Interface intercom jointers, Intercom interface male connectors, Interconnecting cable for amplifying device to conversion device, Auxiliary connecting cables 3. 5 to banana jack, Electric signal to audio conversion device connector, Portable entertainment system with power supply backup, J box for telephone two in one, J Box connection patch cords 3 point, Projector stand, TV Stand, Slide changer or pointer