Both can send signal and power over a single unshielded Cat6 cable as well as RS-232 and infrared control of third party devices. The output of the MU400-123 unit is monitored for power consumption and when power is exceeded, the output is turned off to protect all components. The Muse can power devices with a maximum continuous power consumption of 150 watts. The MU400-123 has many advanced features to safely transmit power to the source and receive HDMI video. These features include current monitoring, auto shutdown, and auto receiver detection.
The MU500-122 provides constant power and voltage to the HDMI source device. When the Cat6 cable length increases, the system automatically adjusts itself to provide the maximum possible power to the display. The MU400-123 and MU500-122 combination has a built in IR channel that allows IR signals to be sent from the MUSE transmitter (display side) to the Muse receiver (HDMI source side), to control AV equipment. This feature simplifies setup and provides convenience when AV equipment is hidden from sight.
The Altinex MU400-123 and MU500-122 list for $700.00 and $795.00, respectively. More information on MUSE is here.