A device that plugs into your pcs serial port and can pretend to be a remote control unit. Its main use would be to control the channel your satellite or cable box and change channels for recording.
Small transmitter that allows the Tivo to control an external tuner device such as a VCR or set top box such as Foxtel or Sky TV.
A device that enables a DVD recorder or DVR to control your cable box or satellite receiver by sending signals that mimic those of a remote control. An IR blaster looks like a regular cable with two distinctly different ends. One end plugs into the back of a compatible DVD recorder or DVR. The other end is the IR emitter. It sits in front of the cable box/satellite receiver's IR sensor, which is located on the front-panel. IR blasters make for easier unattended timer recordings, since the DVD recorder/DVR can tune the set-top box to the right channel at the right time.