... of radio waves and can be used for wireless sharing of AV signals of DVD, DVR, CCD camera, IPTV, satellite STB ... .Compatible with DVD, DVR, CCD camera, IPTV, satellite STB, digital TV STB and other AV output devices.Images received ... W) ×3.0cm (H).2.4GHz module is CE & FCC certificated. Wireless application is safe and reliable. 2.4ghz Wireless Sender and Receiver Support 4 groups of channels