... select these channels to avoid interference from signals of a wireless router, etc.4. Compatible with DVD, DVR, CCD camera, ... , satellite STB, digital TV STB and other AV output devices.5. Superheterodyne 433MHz Wireless IR Remote Extender is fully compatible with ... are vivid and stable, the color is flamboyant, and the sound is clear.7. Supports video transmission of PAL/NTSC system and stereo audio ...