2.4G wireless av sender 250m transmission distance IR Remote Extender 4 Selectable channels Function and Features:1. Use 2.4GHz ISM frequency band.2. 250m ... a wireless router, etc.4. Compatible with DVD, DVR, CCD camera, IPTV, satellite STB, digital TV STB and other AV output ... fully compatible with remote control signals of DVD, DVR, CCD camera, IPTV, satellite STB, digital TV STB and other AV devices ...