Vktech Pat-330 150m 2.4g 2.4ghz Wireless Av Sender Tv Audio Video Transmitter Receiver 100% Brand new and high quality Use 2.4GHz ISM frequency band. Support 4 groups of channels. Wireless transmit 150m. Compatible with DVD, DVR, CCD camera, IPTV, satellite STB, digital TV STB and other AV output devices.